Science Advances

Overview

Research into technology is a necessity for improving the ability of your civilization to develop new military units and city improvements.

There are a few ways to gain advances from other civilizations: you will sometimes discover enemy technology when you capture a city; your agents can steal advances; wonders can provide you with technology; and another player might grant technology in the terms of a pact. But otherwise advances must be discovered through the efforts of your own people.

Most technology progress comes from trade (see the Trade section) and, from scientist specialists. While it is possible to change which advance you are currently researching, by default all progress is lost by doing so.

While the majority of the resulting research output ("bulbs") usually goes toward advancing technology; the quantity required for technology upkeep increases with the total research cost of all advances known to you. The state of advancement at which you start paying this upkeep may depend on factors such as your government type. If research output drops below that required for upkeep, your civilization will forget an advance, requiring it to be researched again.

Technological advances can render units, city improvements, and wonders obsolete. While obsolete units merely become impossible for you to make -- leaving the ones you have already made intact -- obsolete improvements are immediately sold, and obsolete wonders lose their effect. See the relevant sections for more information.

Absolutism

To research Absolutism, you need to research 8 other technologies first. The whole project will require 409 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.
Allows government form Despotism (with Palace).
Allows to research:
    → Code of Laws
        → Literacy
            → First Republic
            → Paper Making
            → Philosophy
        → Monarchy
            → Feudalism
            → Paper Making
    → Masonry
        → Drama
            → Martial Games
        → Iron Working
            → Construction
            → Feudalism
            → Simple Machines
    → Monotheism
        → Christianity
            → Theology
        → Islam
            → Fundamentalism
            → Shiism
Requires knowledges:
    → Animal Husbandry
    → Pottery
        → Agricultural Farming
    → Forestry
    → Creative Art
        → Carpentry

Advanced Flight

To research Advanced Flight, you need to research 96 other technologies first. The whole project will require 98123 bulbs to complete. This number may vary depending on what other players research.

Only those who know Egalitarianism, First Republic, Martial Games, Mathematics, Metallurgy, and Seafaring can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Fighter.
Allows to build Bomber.
Allows to build Carrier.
Allows to research:
    → Plastics
        → Stealth
        → Superconductors
            → Great Unification Theory
    → Radar
        → Combined Arms
            → Command and Control
        → Jet Propulsion
            → Rocketry
Requires knowledges:
    → Engineering
    → Electromagnetism
        → Radio
    → Combustion
    → Screw Propeller
        → Flight

Advanced Rocketry

To research Advanced Rocketry, you need to research 134 other technologies first. The whole project will require 316379 bulbs to complete. This number may vary depending on what other players research.

Only those who know Combustion, Communism, Electricity, Electronics, Flight, Literacy, Nuclear Fission, and University can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Tactical ABM.
Allows to build Cruise Missile.
Allows to build Nuclear.
Allows to research:
→ Nanotechnology
→ Genetic Engineering
Requires knowledges:
    → Computers
    → Rocketry
        → Space Flight
    → Nuclear Fission
    → Recycling
        → Nuclear Power

Agricultural Farming

To research Agricultural Farming, you need to research 5 other technologies first. The whole project will require 218 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.

Allows irrigation if tile adjacent to fresh water (river, lake, swamp or other irrigation).

Allows to build City Hall.
Allows to build Settlers.
Allows to research:
    → Absolutism
        → Code of Laws
            → Literacy
            → Monarchy
        → Masonry
            → Drama
            → Iron Working
        → Monotheism
            → Christianity
            → Islam
    → Copper Working
        → Bronze Working
            → Iron Working
        → Currency
            → First Republic
            → Trade
        → Masonry
            → Drama
            → Iron Working
        → Saddle Stirrup
            → Chivalry
            → Slave Trade
    → Polytheism
        → Direct Democracy
            → Glass Working
            → Philosophy
        → Vedism
            → Buddhism
            → Hinduism
            → Monotheism
Requires knowledges:
    → Fire Making
    → Stone Knapping
        → Animal Husbandry
    → Forestry
        → Pottery

Alchemy

To research Alchemy, you need to research 41 other technologies first. The whole project will require 7931 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming, Mysticism, and Polytheism can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to research:
    → Chemistry
        → Atomic Theory
            → Electromagnetism
            → Radioactivity
        → Biology
            → Refrigeration
        → Explosives
            → Conscription
            → Engineering
        → Steam Engine
            → Railroad
            → Screw Propeller
    → Gunpowder
        → Leadership
            → General Staff
        → Metallurgy
            → Explosives
            → General Staff
            → Railroad
        → Overseas Trade
            → Machinery
Requires knowledges:
    → Glass Working
    → Feudalism
        → Craft Guilds
    → Mysticism
    → Mathematics
        → Astrology

Alphabet

To research Alphabet, you need to research 2 other technologies first. The whole project will require 76 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Stonehenge.
Allows to build Messenger.
Allows to research:
    → Ceremonial Burial
        → Monarchy
            → Feudalism
            → Paper Making
        → Mysticism
            → Astrology
            → Hinduism
        → Polytheism
            → Direct Democracy
            → Vedism
    → Code of Laws
        → Literacy
            → First Republic
            → Paper Making
            → Philosophy
        → Monarchy
            → Feudalism
            → Paper Making
    → Map Making
        → Seafaring
            → Direct Democracy
            → Shinto
    → Writing
        → Currency
            → First Republic
            → Trade
        → Drama
            → Martial Games
        → Literacy
            → First Republic
            → Paper Making
            → Philosophy
        → Vedism
            → Buddhism
            → Hinduism
            → Monotheism
Requires knowledges:
→ Creative Art
→ Stone Knapping

Amphibious Warfare

To research Amphibious Warfare, you need to research 108 other technologies first. The whole project will require 149531 bulbs to complete. This number may vary depending on what other players research.

Only those who know Combustion, Communism, and Steel can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Marines.
Allows to build Floating Bridge.
Allows to build Patrol Boat.
Allows to research:
    → Combined Arms
        → Command and Control
            → Modern Warfare
Requires knowledges:
    → Espionage
    → Welding Technology
        → Mobile Warfare
    → Concrete
    → Turbine
        → Offshore Exploration

Animal Husbandry

To research Animal Husbandry, you need to research 2 other technologies first. The whole project will require 61 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Scout.
Allows to research:
    → Agricultural Farming
        → Absolutism
            → Code of Laws
            → Masonry
            → Monotheism
        → Copper Working
            → Bronze Working
            → Currency
            → Masonry
            → Saddle Stirrup
        → Polytheism
            → Direct Democracy
            → Vedism
    → Horseback Riding
        → Pastoralism
            → Exploration
            → Mysticism
        → The Harness
            → Construction
            → Saddle Stirrup
Requires knowledges:
→ Fire Making
→ Stone Knapping

Antimatter Propulsion

To research Antimatter Propulsion, you need to research 129 other technologies first. The whole project will require 373355 bulbs to complete. This number may vary depending on what other players research.

Only those who know Combustion, Communism, Electricity, Electronics, Flight, Great Unification Theory, and Literacy can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Antimatter Fighter.
Allows to build Antimatter Bomber.
Requires knowledges:
    → Superconductors
    → Theory of Relativity
        → Great Unification Theory
    → Plastics
    → Space Flight
        → Stealth

Artificial Intelligence

To research Artificial Intelligence, you need to research 138 other technologies first. The whole project will require 396251 bulbs to complete. This number may vary depending on what other players research.

Only those who know Combustion, Communism, Computers, Flight, Miniaturization, Nuclear Fission, and University can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Aut. War Mech.
Requires knowledges:
    → Recycling
    → Space Flight
        → Environmentalism
    → Robotics
    → Advanced Rocketry
        → Nanotechnology

Astrology

To research Astrology, you need to research 26 other technologies first. The whole project will require 3674 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.
Allows to research:
    → Alchemy
        → Chemistry
            → Atomic Theory
            → Biology
            → Explosives
            → Steam Engine
        → Gunpowder
            → Leadership
            → Metallurgy
            → Overseas Trade
    → Astronomy
        → Navigation
            → Magnetism
        → Theory of Gravity
            → Machinery
            → Physics
    → Jainism
Requires knowledges:
    → Ceremonial Burial
    → Pastoralism
        → Mysticism
    → Construction
    → Simple Machines
        → Mathematics

Astronomy

To research Astronomy, you need to research 37 other technologies first. The whole project will require 6515 bulbs to complete. This number may vary depending on what other players research.

Only those who know Polytheism can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Copernicus' Observatory (with Culture 3500).
Allows to research:
    → Navigation
        → Magnetism
            → Overseas Trade
            → Physics
    → Theory of Gravity
        → Machinery
            → Socialism
            → Steam Engine
        → Physics
            → Atomic Theory
            → Electricity
            → Optics
            → Screw Propeller
Requires knowledges:
    → Mysticism
    → Mathematics
        → Astrology
    → Direct Democracy
    → Trade
        → Glass Working

Atomic Theory

To research Atomic Theory, you need to research 56 other technologies first. The whole project will require 23171 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming, Code of Laws, Mathematics, Mysticism, Polytheism, The Wheel, and Writing can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to research:
    → Electromagnetism
        → Radio
            → Advanced Flight
            → Electronics
            → Espionage
            → Theory of Relativity
        → Welding Technology
            → Mass Production
            → Mobile Warfare
    → Radioactivity
        → Biotechnology
            → Genetic Engineering
            → Recycling
        → Quantum Theory
            → Nuclear Fission
            → Superconductors
Requires knowledges:
    → University
    → Alchemy
        → Chemistry
    → Theory of Gravity
    → Magnetism
        → Physics

Automobile

To research Automobile, you need to research 93 other technologies first. The whole project will require 86987 bulbs to complete. This number may vary depending on what other players research.

Only those who know Egalitarianism, First Republic, Martial Games, Mathematics, Metallurgy, and Seafaring can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.

TIP: Allow Engineers and Trains to upgrade Paved Road to Highway.

Allows to build Bicycle Infantry.
Allows to build Armored Car.
Allows to research:
    → Logistics
        → Mass Production
            → Miniaturization
    → Welding Technology
        → Mass Production
            → Miniaturization
        → Mobile Warfare
            → Amphibious Warfare
            → Jet Propulsion
            → Robotics
Requires knowledges:
    → Refining
    → Turbine
        → Combustion
    → Steel
    → Chemical Synthesis
        → Machine Tools

Banking

To research Banking, you need to research 23 other technologies first. The whole project will require 2874 bulbs to complete. This number may vary depending on what other players research.

Only those who know Code of Laws can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Bank (with Marketplace).
Allows to research:
    → Economics
        → Democracy
            → Conscription
            → Federation
    → The Republic
        → Industrialization
            → Electricity
            → Engineering
            → Federation
            → Labor Union
            → Zaibatsu
Requires knowledges:
    → Currency
    → Exploration
        → Trade
    → Literacy
    → Currency
        → First Republic

Biology

To research Biology, you need to research 49 other technologies first. The whole project will require 15587 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming, Mysticism, and University can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Pasteur Institute (with University and Culture 5300).
Allows to research:
    → Refrigeration
        → Biotechnology
            → Genetic Engineering
            → Recycling
Requires knowledges:
    → Bridge Building
    → Medicine
        → Sanitation
    → University
    → Alchemy
        → Chemistry

Biotechnology

To research Biotechnology, you need to research 94 other technologies first. The whole project will require 87083 bulbs to complete. This number may vary depending on what other players research.

Only those who know Egalitarianism, First Republic, Martial Games, Mathematics, Metallurgy, Seafaring, and University can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Hospital.
Allows to research:
    → Genetic Engineering
    → Recycling
        → Environmentalism
        → Nuclear Power
            → Advanced Rocketry
            → Laser
Requires knowledges:
    → Atomic Theory
    → Chemical Synthesis
        → Radioactivity
    → Biology
    → Refining
        → Refrigeration

Bridge Building

To research Bridge Building, you need to research 20 other technologies first. The whole project will require 2700 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.

Allows roads to be built on river tiles.

Allows to build Battering Ram.
Allows to research:
    → Invention
        → Gunpowder
            → Leadership
            → Metallurgy
            → Overseas Trade
        → Navigation
            → Magnetism
        → Printing Press
            → Egalitarianism
            → Theatre
    → Sanitation
        → Biology
            → Refrigeration
Requires knowledges:
    → The Wheel
    → Iron Working
        → Simple Machines
    → The Harness
    → Iron Working
        → Construction

Bronze Working

To research Bronze Working, you need to research 11 other technologies first. The whole project will require 619 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.

Enable mine production, obsoletes Tribe Hut.

Allows to build Colossus.
Allows to build Phalanx.
Allows to build Skirmishers.
Allows to research:
    → Iron Working
        → Construction
            → Bridge Building
            → Martial Games
            → Mathematics
        → Feudalism
            → Chivalry
            → Craft Guilds
            → Desert Code
            → Shogunate
        → Simple Machines
            → Bridge Building
            → Mathematics
Requires knowledges:
    → Agricultural Farming
    → Warrior Code
        → Copper Working
    → Forestry
    → Creative Art
        → Carpentry

Buddhism

To research Buddhism, you need to research 15 other technologies first. The whole project will require 1446 bulbs to complete. This number may vary depending on what other players research.

Only those who know Vedism can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Leshan Buddha Statue (with Temple and Culture 2200).
Allows to research:
    → Confucianism
        → Martial Arts
            → Bushido
    → Shinto
        → Shogunate
            → Martial Arts
Requires knowledges:
    → Polytheism
    → Writing
        → Vedism
    → Carpentry
    → Pottery
        → The Wheel

Bushido

To research Bushido, you need to research 44 other technologies first. The whole project will require 11195 bulbs to complete. This number may vary depending on what other players research.

Only those who know Martial Arts can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Kyoto Fushimi Inari (with Temple, Shrine Torii, and Culture 3800 but no Church, Cathedral, Mosque, Kaaba, King Richard's Crusade, Michelangelo's Chapel, J.S. Bach's Cathedral, Temple of City God, or Taj Mahal).
Allows to build Mounted Samurai.
Allows to research:
→ Zaibatsu
Requires knowledges:
    → Shogunate
    → Confucianism
        → Martial Arts
    → Feudalism
    → Saddle Stirrup
        → Chivalry

Carpentry

To research Carpentry, you need to research 4 other technologies first. The whole project will require 147 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.

Allows Settlers, Migrants, Slaves, Workers and Engineers to build Forts.

Allows to build Aqueduct, Lake (with Lake).
Allows to build Aqueduct, River (with River but no Lake).
Allows to build Palace (with Culture 10).
Allows to research:
    → Absolutism
        → Code of Laws
            → Literacy
            → Monarchy
        → Masonry
            → Drama
            → Iron Working
        → Monotheism
            → Christianity
            → Islam
    → Bronze Working
        → Iron Working
            → Construction
            → Feudalism
            → Simple Machines
    → The Wheel
        → Buddhism
            → Confucianism
            → Shinto
        → Simple Machines
            → Bridge Building
            → Mathematics
        → The Harness
            → Construction
            → Saddle Stirrup
Requires knowledges:
    → Stone Knapping
    → Fire Making
        → Forestry
        → Creative Art

Ceremonial Burial

To research Ceremonial Burial, you need to research 5 other technologies first. The whole project will require 205 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Temple (absent Church and Mosque).
Allows to build Mausoleum of Mausolos (with Temple but no Church, Cathedral, or Mosque).
Allows to research:
    → Monarchy
        → Feudalism
            → Chivalry
            → Craft Guilds
            → Desert Code
            → Shogunate
        → Paper Making
            → Printing Press
            → Taoism
    → Mysticism
        → Astrology
            → Alchemy
            → Astronomy
            → Jainism
        → Hinduism
            → Jainism
    → Polytheism
        → Direct Democracy
            → Glass Working
            → Philosophy
        → Vedism
            → Buddhism
            → Hinduism
            → Monotheism
Requires knowledges:
    → Fire Making
    → Creative Art
        → Shamanism
    → Creative Art
    → Stone Knapping
        → Alphabet

Chemical Synthesis

To research Chemical Synthesis, you need to research 85 other technologies first. The whole project will require 61019 bulbs to complete. This number may vary depending on what other players research.

Only those who know Egalitarianism, First Republic, Iron Working, Martial Games, Mathematics, Mysticism, and Seafaring can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.

TIP: Enables farm fields - second irrigation.

Allows to build Stormtrooper.
Allows to build Howitzer.
Allows to research:
    → Machine Tools
        → Automobile
            → Logistics
            → Welding Technology
    → Radioactivity
        → Biotechnology
            → Genetic Engineering
            → Recycling
        → Quantum Theory
            → Nuclear Fission
            → Superconductors
    → Refining
        → Combustion
            → Automobile
            → Flight
        → Refrigeration
            → Biotechnology
        → The Corporation
            → Communism
            → Logistics
            → Mass Entertainment
Requires knowledges:
    → Industrialization
    → Physics
        → Electricity
    → Conscription
    → General Staff
        → Tactics

Chemistry

To research Chemistry, you need to research 46 other technologies first. The whole project will require 12083 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming, Mysticism, Polytheism, and Writing can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Balloon.
Allows to research:
    → Atomic Theory
        → Electromagnetism
            → Radio
            → Welding Technology
        → Radioactivity
            → Biotechnology
            → Quantum Theory
    → Biology
        → Refrigeration
            → Biotechnology
    → Explosives
        → Conscription
            → Tactics
        → Engineering
            → Optics
            → Radio
            → Steel
    → Steam Engine
        → Railroad
            → Industrialization
        → Screw Propeller
            → Flight
            → Turbine
Requires knowledges:
    → Mathematics
    → Medicine
        → University
    → Craft Guilds
    → Astrology
        → Alchemy

Chivalry

To research Chivalry, you need to research 25 other technologies first. The whole project will require 3194 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build King Richard's Crusade (with Culture 1800 but no Temple, Mosque, Kaaba, Taj Mahal, or Kyoto Fushimi Inari).
Allows to build Knights.
Allows to research:
    → Bushido
        → Zaibatsu
    → Hastilude
        → Leadership
            → General Staff
        → Theatre
            → Cinematography
Requires knowledges:
    → Iron Working
    → Monarchy
        → Feudalism
    → The Harness
    → Copper Working
        → Saddle Stirrup

Christianity

To research Christianity, you need to research 23 other technologies first. The whole project will require 3100 bulbs to complete. This number may vary depending on what other players research.

Only those who know Code of Laws and Monotheism can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Church (with Culture 1000 but no Mosque, Monk Monastery, or Temple of City God).
Allows to build Michelangelo's Chapel (with Church and Culture 3800 but no Temple, Mosque, Kaaba, Leshan Buddha Statue, Golden Temple, Temple of City God, Taj Mahal, or Kyoto Fushimi Inari).
Allows to research:
    → Theology
        → Egalitarianism
            → Democracy
            → Socialism
            → The Republic
        → Fundamentalism
Requires knowledges:
    → Vedism
    → Absolutism
        → Monotheism
    → Literacy
    → Currency
        → First Republic

Cinematography

To research Cinematography, you need to research 79 other technologies first. The whole project will require 49163 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming, First Republic, Iron Working, Literacy, Martial Games, Mathematics, Mysticism, Seafaring, The Wheel, and Theology can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Hollywood (with Women's Suffrage and Culture 15500).
Allows to research:
    → Mass Entertainment
        → Television
            → Computers
            → Radar
Requires knowledges:
    → Hastilude
    → Printing Press
        → Theatre
    → Industrialization
    → Physics
        → Electricity

Code of Laws

To research Code of Laws, you need to research 10 other technologies first. The whole project will require 601 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Courthouse (with Culture 200).
Allows to research:
    → Literacy
        → First Republic
            → Banking
            → Christianity
            → Invention
            → Thalassocracy
        → Paper Making
            → Printing Press
            → Taoism
        → Philosophy
            → Medicine
            → Shiism
            → Taoism
            → Theology
    → Monarchy
        → Feudalism
            → Chivalry
            → Craft Guilds
            → Desert Code
            → Shogunate
        → Paper Making
            → Printing Press
            → Taoism
Requires knowledges:
    → Creative Art
    → Stone Knapping
        → Alphabet
    → Agricultural Farming
    → Carpentry
        → Absolutism

Combined Arms

To research Combined Arms, you need to research 118 other technologies first. The whole project will require 202235 bulbs to complete. This number may vary depending on what other players research.

Only those who know Combustion, Communism, Electricity, Electronics, Literacy, and Steel can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Navy Seals.
Allows to build Paratroopers.
Allows to build Helicopter.
Allows to research:
→ Command and Control
→ Modern Warfare
Requires knowledges:
    → Mobile Warfare
    → Offshore Exploration
        → Amphibious Warfare
    → Television
    → Advanced Flight
        → Radar

Combustion

To research Combustion, you need to research 91 other technologies first. The whole project will require 79739 bulbs to complete. This number may vary depending on what other players research.

Only those who know Egalitarianism, First Republic, Martial Games, Mathematics, Metallurgy, and Seafaring can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.

Makes it possible for Engineers to transform terrains.

Allows to build Cruiser.
Allows to build Submarine.
Allows to build Torpedo.
Allows to research:
    → Automobile
        → Logistics
            → Mass Production
        → Welding Technology
            → Mass Production
            → Mobile Warfare
    → Flight
        → Advanced Flight
            → Plastics
            → Radar
Requires knowledges:
    → Chemical Synthesis
    → Steel
        → Refining
    → Steel
    → Screw Propeller
        → Turbine

Command and Control

To research Command and Control, you need to research 123 other technologies first. The whole project will require 245579 bulbs to complete. This number may vary depending on what other players research.

Only those who know Combustion, Communism, Electricity, Electronics, Literacy, and Steel can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build ATV Infantry.
Allows to research:
→ Modern Warfare
Requires knowledges:
    → Amphibious Warfare
    → Radar
        → Combined Arms
    → Miniaturization
    → Television
        → Computers

Communism

To research Communism, you need to research 94 other technologies first. The whole project will require 90539 bulbs to complete. This number may vary depending on what other players research.

Only those who know Egalitarianism, First Republic, Martial Games, Mathematics, Metallurgy, and Seafaring can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.

Reduces the effect of Cathedrals and Mysticism.

Allows government form Communism.
Allows to build United Nations (with Culture 12500).
Allows to build Little Green Men.
Allows to research:
    → Espionage
        → Mobile Warfare
            → Amphibious Warfare
            → Jet Propulsion
            → Robotics
Requires knowledges:
    → Labor Union
    → Tactics
        → Guerilla Warfare
    → Federation
    → Refining
        → The Corporation

Computers

To research Computers, you need to research 109 other technologies first. The whole project will require 157835 bulbs to complete. This number may vary depending on what other players research.

Only those who know Egalitarianism, Electricity, Electronics, Literacy, Martial Games, and Steel can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build DARPA (with Research Lab and Culture 14500).
Allows to research:
    → Command and Control
        → Modern Warfare
    → Laser
    → Robotics
        → Nanotechnology
            → Genetic Engineering
    → Space Flight
        → Advanced Rocketry
            → Nanotechnology
        → Environmentalism
        → Satellite System
            → Modern Warfare
        → Stealth
Requires knowledges:
    → Mass Production
    → Electronics
        → Miniaturization
    → Mass Entertainment
    → Electronics
        → Television

Concrete

To research Concrete, you need to research 78 other technologies first. The whole project will require 59219 bulbs to complete. This number may vary depending on what other players research.

Only those who know First Republic, Mathematics, Metallurgy, Seafaring, and Theology can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Bunkers.
Allows to build Cement Plant (with Railway Station, Factory, and Mountains but no Research Lab).
Allows to build River Embankments (with River and Sewer System).
Allows to research:
    → Offshore Exploration
        → Amphibious Warfare
            → Combined Arms
        → Recycling
            → Environmentalism
            → Nuclear Power
Requires knowledges:
    → Engineering
    → Electricity
        → Steel
    → Socialism
    → Industrialization
        → Labor Union

Confucianism

To research Confucianism, you need to research 31 other technologies first. The whole project will require 5423 bulbs to complete. This number may vary depending on what other players research.

Only those who know Taoism and Vedism can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Forbidden City (with Temple, City Walls, and Culture 3400 but no Ecclesiastical Palace, Angkor Wat, Sultan Palace, Osaka Castle, or Palace).
Allows to build Sun Tzu's War Academy (with Culture 2800).
Allows to research:
    → Martial Arts
        → Bushido
            → Zaibatsu
Requires knowledges:
    → Paper Making
    → Philosophy
        → Taoism
    → Vedism
    → The Wheel
        → Buddhism

Conscription

To research Conscription, you need to research 63 other technologies first. The whole project will require 28211 bulbs to complete. This number may vary depending on what other players research.

Only those who know Egalitarianism, Iron Working, and Mysticism can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Women's Suffrage (with Slavery Abolition and Culture 8400).
Allows to build Riflemen.
Allows to research:
    → Tactics
        → Chemical Synthesis
            → Machine Tools
            → Radioactivity
            → Refining
        → Guerilla Warfare
            → Communism
Requires knowledges:
    → Economics
    → Egalitarianism
        → Democracy
    → Metallurgy
    → Chemistry
        → Explosives

Construction

To research Construction, you need to research 18 other technologies first. The whole project will require 1860 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.

Allows Settlers, Migrants, Slaves, Workers and Engineers to build fortresses.

Allows to build Aqueduct (with Irrigation but no River or Lake).
Allows to research:
    → Bridge Building
        → Invention
            → Gunpowder
            → Navigation
            → Printing Press
        → Sanitation
            → Biology
    → Martial Games
        → Hastilude
            → Leadership
            → Theatre
    → Mathematics
        → Astrology
            → Alchemy
            → Astronomy
            → Jainism
        → University
            → Chemistry
            → Economics
            → Metallurgy
            → Theory of Gravity
Requires knowledges:
    → Horseback Riding
    → The Wheel
        → The Harness
    → Bronze Working
    → Masonry
        → Iron Working

Copper Working

To research Copper Working, you need to research 9 other technologies first. The whole project will require 413 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.

Allows making mining (Bronze Working required to yield mining production)

Allows to build Archers.
Allows to research:
    → Bronze Working
        → Iron Working
            → Construction
            → Feudalism
            → Simple Machines
    → Currency
        → First Republic
            → Banking
            → Christianity
            → Invention
            → Thalassocracy
        → Trade
            → Banking
            → Glass Working
            → Slave Trade
    → Masonry
        → Drama
            → Martial Games
        → Iron Working
            → Construction
            → Feudalism
            → Simple Machines
    → Saddle Stirrup
        → Chivalry
            → Bushido
            → Hastilude
        → Slave Trade
            → Desert Code
Requires knowledges:
    → Animal Husbandry
    → Pottery
        → Agricultural Farming
    → Creative Art
    → Leather Tanning
        → Warrior Code

Craft Guilds

To research Craft Guilds, you need to research 33 other technologies first. The whole project will require 4922 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming and Polytheism can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Manufacture.
Allows to build Halberdier.
Allows to research:
    → Alchemy
        → Chemistry
            → Atomic Theory
            → Biology
            → Explosives
            → Steam Engine
        → Gunpowder
            → Leadership
            → Metallurgy
            → Overseas Trade
Requires knowledges:
    → Direct Democracy
    → Trade
        → Glass Working
    → Iron Working
    → Monarchy
        → Feudalism

Currency

To research Currency, you need to research 12 other technologies first. The whole project will require 725 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Marketplace.
Allows to research:
    → First Republic
        → Banking
            → Economics
            → The Republic
        → Christianity
            → Theology
        → Invention
            → Gunpowder
            → Navigation
            → Printing Press
        → Thalassocracy
            → Magnetism
    → Trade
        → Banking
            → Economics
            → The Republic
        → Glass Working
            → Astronomy
            → Craft Guilds
            → Medicine
            → Thalassocracy
        → Slave Trade
            → Desert Code
Requires knowledges:
    → Agricultural Farming
    → Warrior Code
        → Copper Working
    → Alphabet
    → Pottery
        → Writing

Creative Art

To research Creative Art, it would need 14 bulbs. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Geoglyph.
Allows to research:
    → Alphabet
        → Ceremonial Burial
            → Monarchy
            → Mysticism
            → Polytheism
        → Code of Laws
            → Literacy
            → Monarchy
        → Map Making
            → Seafaring
        → Writing
            → Currency
            → Drama
            → Literacy
            → Vedism
    → Carpentry
        → Absolutism
            → Code of Laws
            → Masonry
            → Monotheism
        → Bronze Working
            → Iron Working
        → The Wheel
            → Buddhism
            → Simple Machines
            → The Harness
    → Shamanism
        → Ceremonial Burial
            → Monarchy
            → Mysticism
            → Polytheism
    → Warrior Code
        → Copper Working
            → Bronze Working
            → Currency
            → Masonry
            → Saddle Stirrup\

Democracy

To research Democracy, you need to research 53 other technologies first. The whole project will require 17723 bulbs to complete. This number may vary depending on what other players research.

Only those who know Egalitarianism can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows government form Democracy (with Palace).
Allows to build Statue of Liberty (with Culture 9800).
Allows to research:
    → Conscription
        → Tactics
            → Chemical Synthesis
            → Guerilla Warfare
    → Federation
        → The Corporation
            → Communism
            → Logistics
            → Mass Entertainment
Requires knowledges:
    → Banking
    → University
        → Economics
    → Theology
    → Printing Press
        → Egalitarianism

Desert Code

To research Desert Code, you need to research 32 other technologies first. The whole project will require 4499 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Dromedari.
Allows to research:
    → Islam
        → Fundamentalism
        → Shiism
Requires knowledges:
    → Saddle Stirrup
    → Trade
        → Slave Trade
    → Iron Working
    → Monarchy
        → Feudalism

Direct Democracy

To research Direct Democracy, you need to research 18 other technologies first. The whole project will require 1550 bulbs to complete. This number may vary depending on what other players research.

Only those who know Polytheism can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows government form Direct Democracy (with Palace).
Allows to research:
    → Glass Working
        → Astronomy
            → Navigation
            → Theory of Gravity
        → Craft Guilds
            → Alchemy
        → Medicine
            → Sanitation
            → University
        → Thalassocracy
            → Magnetism
    → Philosophy
        → Medicine
            → Sanitation
            → University
        → Shiism
        → Taoism
            → Confucianism
        → Theology
            → Egalitarianism
            → Fundamentalism
Requires knowledges:
    → Agricultural Farming
    → Ceremonial Burial
        → Polytheism
    → Exploration
    → Map Making
        → Seafaring

Drama

To research Drama, you need to research 15 other technologies first. The whole project will require 1170 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.

Additional culture point to each city, if Shakespeare's Theater exist

Allows to build Amphitheater (with Culture 500).
Allows to research:
    → Martial Games
        → Hastilude
            → Leadership
            → Theatre
Requires knowledges:
    → Alphabet
    → Pottery
        → Writing
    → Absolutism
    → Copper Working
        → Masonry

Economics

To research Economics, you need to research 42 other technologies first. The whole project will require 10187 bulbs to complete. This number may vary depending on what other players research.

Only those who know Code of Laws, Polytheism, and Writing can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Stock Exchange (with Bank and City Hall).
Allows to build A.Smith's Trading Co. (with Stock Exchange and Culture 5000).
Allows to research:
    → Democracy
        → Conscription
            → Tactics
        → Federation
            → The Corporation
Requires knowledges:
    → Trade
    → First Republic
        → Banking
    → Mathematics
    → Medicine
        → University

Egalitarianism

To research Egalitarianism, you need to research 45 other technologies first. The whole project will require 10499 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming, The Wheel, and Theology can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Slavery Abolition (with Courthouse and Culture 3500).
Allows to research:
    → Democracy
        → Conscription
            → Tactics
        → Federation
            → The Corporation
    → Socialism
        → Labor Union
            → Concrete
            → Guerilla Warfare
    → The Republic
        → Industrialization
            → Electricity
            → Engineering
            → Federation
            → Labor Union
            → Zaibatsu
Requires knowledges:
    → Philosophy
    → Christianity
        → Theology
    → Paper Making
    → Invention
        → Printing Press

Electricity

To research Electricity, you need to research 72 other technologies first. The whole project will require 42611 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming, First Republic, Iron Working, Mathematics, Mysticism, Seafaring, The Wheel, and Theology can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.

Allows irrigation tiles adjacent only to Sea.

Together with Railway Station and Eiffel Tower, increase radius of cities.

Allows to build Fire Station (with Water Treatment).
Allows to build Power Plant (with Factory).
Allows to research:
    → Chemical Synthesis
        → Machine Tools
            → Automobile
        → Radioactivity
            → Biotechnology
            → Quantum Theory
        → Refining
            → Combustion
            → Refrigeration
            → The Corporation
    → Cinematography
        → Mass Entertainment
            → Television
    → Electromagnetism
        → Radio
            → Advanced Flight
            → Electronics
            → Espionage
            → Theory of Relativity
        → Welding Technology
            → Mass Production
            → Mobile Warfare
    → Steel
        → Concrete
            → Offshore Exploration
        → Machine Tools
            → Automobile
        → Refining
            → Combustion
            → Refrigeration
            → The Corporation
        → Turbine
            → Combustion
            → Offshore Exploration
Requires knowledges:
    → Railroad
    → The Republic
        → Industrialization
    → Theory of Gravity
    → Magnetism
        → Physics

Electromagnetism

To research Electromagnetism, you need to research 74 other technologies first. The whole project will require 48083 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming, First Republic, Iron Working, Mathematics, Mysticism, Seafaring, The Wheel, and Theology can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Post Office.
Allows to research:
    → Radio
        → Advanced Flight
            → Plastics
            → Radar
        → Electronics
            → Miniaturization
            → Television
        → Espionage
            → Mobile Warfare
        → Theory of Relativity
            → Great Unification Theory
            → Nuclear Fission
            → Satellite System
    → Welding Technology
        → Mass Production
            → Miniaturization
        → Mobile Warfare
            → Amphibious Warfare
            → Jet Propulsion
            → Robotics
Requires knowledges:
    → Industrialization
    → Physics
        → Electricity
    → Chemistry
    → Physics
        → Atomic Theory

Electronics

To research Electronics, you need to research 79 other technologies first. The whole project will require 65459 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming, First Republic, Iron Working, Mathematics, Mysticism, Seafaring, The Wheel, and Theology can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Massachusetts Institute of Technology (with Factory, Library, and Culture 8300).
Allows to research:
    → Miniaturization
        → Computers
            → Command and Control
            → Laser
            → Robotics
            → Space Flight
        → Plastics
            → Stealth
            → Superconductors
        → Quantum Theory
            → Nuclear Fission
            → Superconductors
        → Rocketry
            → Space Flight
    → Television
        → Computers
            → Command and Control
            → Laser
            → Robotics
            → Space Flight
        → Radar
            → Combined Arms
            → Jet Propulsion
Requires knowledges:
    → Engineering
    → Physics
        → Optics
    → Engineering
    → Electromagnetism
        → Radio

Engineering

To research Engineering, you need to research 72 other technologies first. The whole project will require 42659 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming, First Republic, Iron Working, Mysticism, Seafaring, The Wheel, and Theology can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Builders.
Allows to build Cannon Turret.
Allows to research:
    → Optics
        → Electronics
            → Miniaturization
            → Television
        → Theory of Relativity
            → Great Unification Theory
            → Nuclear Fission
            → Satellite System
    → Radio
        → Advanced Flight
            → Plastics
            → Radar
        → Electronics
            → Miniaturization
            → Television
        → Espionage
            → Mobile Warfare
        → Theory of Relativity
            → Great Unification Theory
            → Nuclear Fission
            → Satellite System
    → Steel
        → Concrete
            → Offshore Exploration
        → Machine Tools
            → Automobile
        → Refining
            → Combustion
            → Refrigeration
            → The Corporation
        → Turbine
            → Combustion
            → Offshore Exploration
Requires knowledges:
    → Railroad
    → The Republic
        → Industrialization
    → Metallurgy
    → Chemistry
        → Explosives

Environmentalism

To research Environmentalism, you need to research 130 other technologies first. The whole project will require 276635 bulbs to complete. This number may vary depending on what other players research.

Only those who know Combustion, Communism, Electricity, Electronics, Flight, Literacy, Steel, and University can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.

TIP: Enables wind turbines - on hills with irrigation.

Allows to build Solar Plant (with Factory).
Allows to build Space Module (with Factory, University, Research Lab, and Space Lift).
Requires knowledges:
    → Offshore Exploration
    → Biotechnology
        → Recycling
    → Computers
    → Rocketry
        → Space Flight

Espionage

To research Espionage, you need to research 98 other technologies first. The whole project will require 105419 bulbs to complete. This number may vary depending on what other players research.

Only those who know Communism can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Spy.
Allows to research:
    → Mobile Warfare
        → Amphibious Warfare
            → Combined Arms
        → Jet Propulsion
            → Rocketry
        → Robotics
            → Nanotechnology
Requires knowledges:
    → Guerilla Warfare
    → The Corporation
        → Communism
    → Engineering
    → Electromagnetism
        → Radio

Exploration

To research Exploration, you need to research 9 other technologies first. The whole project will require 562 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Explorer.
Allows to build Vikings.
Allows to research:
    → Seafaring
        → Direct Democracy
            → Glass Working
            → Philosophy
        → Shinto
            → Shogunate
    → Trade
        → Banking
            → Economics
            → The Republic
        → Glass Working
            → Astronomy
            → Craft Guilds
            → Medicine
            → Thalassocracy
        → Slave Trade
            → Desert Code
Requires knowledges:
    → Horseback Riding
    → Pottery
        → Pastoralism
    → Forestry
    → Leather Tanning
        → Sailing

Explosives

To research Explosives, you need to research 52 other technologies first. The whole project will require 17843 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming, Code of Laws, Iron Working, Mysticism, Polytheism, The Wheel, and Writing can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Grenadier.
Allows to build Artillery.
Allows to research:
    → Conscription
        → Tactics
            → Chemical Synthesis
            → Guerilla Warfare
    → Engineering
        → Optics
            → Electronics
            → Theory of Relativity
        → Radio
            → Advanced Flight
            → Electronics
            → Espionage
            → Theory of Relativity
        → Steel
            → Concrete
            → Machine Tools
            → Refining
            → Turbine
Requires knowledges:
    → Gunpowder
    → University
        → Metallurgy
    → University
    → Alchemy
        → Chemistry

Federation

To research Federation, you need to research 73 other technologies first. The whole project will require 44003 bulbs to complete. This number may vary depending on what other players research.

Only those who know Egalitarianism, First Republic, Iron Working, Mysticism, and Seafaring can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows government form Federation.
Allows to research:
    → The Corporation
        → Communism
            → Espionage
        → Logistics
            → Mass Production
        → Mass Entertainment
            → Television
Requires knowledges:
    → Railroad
    → The Republic
        → Industrialization
    → Economics
    → Egalitarianism
        → Democracy

Feudalism

To research Feudalism, you need to research 20 other technologies first. The whole project will require 2110 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Pikemen.
Allows to build Swordsmen.
Allows to research:
    → Chivalry
        → Bushido
            → Zaibatsu
        → Hastilude
            → Leadership
            → Theatre
    → Craft Guilds
        → Alchemy
            → Chemistry
            → Gunpowder
    → Desert Code
        → Islam
            → Fundamentalism
            → Shiism
    → Shogunate
        → Martial Arts
            → Bushido
Requires knowledges:
    → Bronze Working
    → Masonry
        → Iron Working
    → Ceremonial Burial
    → Code of Laws
        → Monarchy

Fire Making

To research Fire Making, it would need 19 bulbs. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Canoes.
Allows to research:
    → Animal Husbandry
        → Agricultural Farming
            → Absolutism
            → Copper Working
            → Polytheism
        → Horseback Riding
            → Pastoralism
            → The Harness
    → Forestry
        → Carpentry
            → Absolutism
            → Bronze Working
            → The Wheel
        → Pottery
            → Agricultural Farming
            → Pastoralism
            → The Wheel
            → Writing
        → Sailing
            → Exploration
            → Map Making
    → Leather Tanning
        → Horseback Riding
            → Pastoralism
            → The Harness
        → Sailing
            → Exploration
            → Map Making
        → Warrior Code
            → Copper Working
    → Shamanism
        → Ceremonial Burial
            → Monarchy
            → Mysticism
            → Polytheism\

First Republic

To research First Republic, you need to research 17 other technologies first. The whole project will require 1598 bulbs to complete. This number may vary depending on what other players research.

Only those who know Code of Laws can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows government form First Republic (with Palace).
Allows to research:
    → Banking
        → Economics
            → Democracy
        → The Republic
            → Industrialization
    → Christianity
        → Theology
            → Egalitarianism
            → Fundamentalism
    → Invention
        → Gunpowder
            → Leadership
            → Metallurgy
            → Overseas Trade
        → Navigation
            → Magnetism
        → Printing Press
            → Egalitarianism
            → Theatre
    → Thalassocracy
        → Magnetism
            → Overseas Trade
            → Physics
Requires knowledges:
    → Writing
    → Code of Laws
        → Literacy
    → Copper Working
    → Writing
        → Currency

Flight

To research Flight, you need to research 92 other technologies first. The whole project will require 83627 bulbs to complete. This number may vary depending on what other players research.

Only those who know Egalitarianism, First Republic, Martial Games, Mathematics, Metallurgy, and Seafaring can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Zeppelin.
Allows to build Airplane.
Allows to research:
    → Advanced Flight
        → Plastics
            → Stealth
            → Superconductors
        → Radar
            → Combined Arms
            → Jet Propulsion
Requires knowledges:
    → Refining
    → Turbine
        → Combustion
    → Steam Engine
    → Physics
        → Screw Propeller

Forestry

To research Forestry, you need to research 2 other technologies first. The whole project will require 61 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.

Allows planting forests/deforestration.

Allows to build Palisade (absent City Walls and Bunkers).
Allows to build Workers.
Allows to build Raft.
Allows to research:
    → Carpentry
        → Absolutism
            → Code of Laws
            → Masonry
            → Monotheism
        → Bronze Working
            → Iron Working
        → The Wheel
            → Buddhism
            → Simple Machines
            → The Harness
    → Pottery
        → Agricultural Farming
            → Absolutism
            → Copper Working
            → Polytheism
        → Pastoralism
            → Exploration
            → Mysticism
        → The Wheel
            → Buddhism
            → Simple Machines
            → The Harness
        → Writing
            → Currency
            → Drama
            → Literacy
            → Vedism
    → Sailing
        → Exploration
            → Seafaring
            → Trade
        → Map Making
            → Seafaring
Requires knowledges:
→ Stone Knapping
→ Fire Making

Fundamentalism

To research Fundamentalism, you need to research 45 other technologies first. The whole project will require 10019 bulbs to complete. This number may vary depending on what other players research.

Only those who know Code of Laws, Islam, Polytheism, and Writing can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows government form Fundamentalism (with Palace).
Allows to build Madrasa (with Mosque, City Hall, and Culture 2400).
Allows to build Wagenburg.
Requires knowledges:
    → Philosophy
    → Christianity
        → Theology
    → Desert Code
    → Monotheism
        → Islam

Fusion Power

To research Fusion Power, you need to research 129 other technologies first. The whole project will require 295163 bulbs to complete. This number may vary depending on what other players research.

Only those who know Egalitarianism, Electricity, Electronics, Literacy, Martial Games, Steel, Theory of Relativity, and University can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Space Component (with Factory, University, Research Lab, and Space Lift).
Allows to build Fusion Plant (with Research Lab).
Allows to build Railgun Destroyer.
Requires knowledges:
    → Computers
    → Nuclear Power
        → Laser
    → Quantum Theory
    → Plastics
        → Superconductors

General Staff

To research General Staff, you need to research 57 other technologies first. The whole project will require 19643 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming, Code of Laws, Iron Working, Martial Games, Mysticism, Polytheism, The Wheel, and Writing can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Marksman.
Allows to build Lancers.
Allows to research:
    → Tactics
        → Chemical Synthesis
            → Machine Tools
            → Radioactivity
            → Refining
        → Guerilla Warfare
            → Communism
Requires knowledges:
    → Hastilude
    → Gunpowder
        → Leadership
    → Gunpowder
    → University
        → Metallurgy

Genetic Engineering

To research Genetic Engineering, you need to research 137 other technologies first. The whole project will require 379163 bulbs to complete. This number may vary depending on what other players research.

Only those who know Combustion, Communism, Electricity, Electronics, Flight, Literacy, Miniaturization, Nuclear Fission, and University can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Cure For Cancer (with Culture 19000).
Requires knowledges:
    → Radioactivity
    → Refrigeration
        → Biotechnology
    → Robotics
    → Advanced Rocketry
        → Nanotechnology

Glass Working

To research Glass Working, you need to research 24 other technologies first. The whole project will require 2711 bulbs to complete. This number may vary depending on what other players research.

Only those who know Polytheism can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.

Increases fortress vision and Sea units vision radius.

Allows to build Watchtower.
Allows to research:
    → Astronomy
        → Navigation
            → Magnetism
        → Theory of Gravity
            → Machinery
            → Physics
    → Craft Guilds
        → Alchemy
            → Chemistry
            → Gunpowder
    → Medicine
        → Sanitation
            → Biology
        → University
            → Chemistry
            → Economics
            → Metallurgy
            → Theory of Gravity
    → Thalassocracy
        → Magnetism
            → Overseas Trade
            → Physics
Requires knowledges:
    → Polytheism
    → Seafaring
        → Direct Democracy
    → Currency
    → Exploration
        → Trade

Great Unification Theory

To research Great Unification Theory, you need to research 112 other technologies first. The whole project will require 218555 bulbs to complete. This number may vary depending on what other players research.

Only those who know Egalitarianism, Martial Games, and Steel can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.

This advance can be given, when Large Hadron Collider is build.

Requires knowledges:
    → Quantum Theory
    → Plastics
        → Superconductors
    → Optics
    → Radio
        → Theory of Relativity

Guerilla Warfare

To research Guerilla Warfare, you need to research 85 other technologies first. The whole project will require 61355 bulbs to complete. This number may vary depending on what other players research.

Only those who know Egalitarianism, First Republic, Iron Working, Martial Games, Mysticism, and Seafaring can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Sniper.
Allows to build Partisan.
Allows to build Fanatics.
Allows to research:
    → Communism
        → Espionage
            → Mobile Warfare
Requires knowledges:
    → Socialism
    → Industrialization
        → Labor Union
    → Conscription
    → General Staff
        → Tactics

Gunpowder

To research Gunpowder, you need to research 46 other technologies first. The whole project will require 10643 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming, Code of Laws, Iron Working, Mysticism, Polytheism, and The Wheel can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Infantry Barracks II.
Allows to build Arquebusiers.
Allows to build Bombard.
Allows to research:
    → Leadership
        → General Staff
            → Tactics
    → Metallurgy
        → Explosives
            → Conscription
            → Engineering
        → General Staff
            → Tactics
        → Railroad
            → Industrialization
    → Overseas Trade
        → Machinery
            → Socialism
            → Steam Engine
Requires knowledges:
    → Bridge Building
    → First Republic
        → Invention
    → Craft Guilds
    → Astrology
        → Alchemy

Hastilude

To research Hastilude, you need to research 30 other technologies first. The whole project will require 5234 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming and Martial Games can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Jousting Tiltyard (with Palace and Culture 1650).
Allows to build Crusaders.
Allows to research:
    → Leadership
        → General Staff
            → Tactics
    → Theatre
        → Cinematography
            → Mass Entertainment
Requires knowledges:
    → Feudalism
    → Saddle Stirrup
        → Chivalry
    → Drama
    → Construction
        → Martial Games

Hinduism

To research Hinduism, you need to research 17 other technologies first. The whole project will require 1589 bulbs to complete. This number may vary depending on what other players research.

Only those who know Vedism can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Angkor Wat (with Temple and Culture 2800 but no Ecclesiastical Palace, Forbidden City, Sultan Palace, Osaka Castle, or Palace).
Allows to build Elephants.
Allows to research:
→ Jainism
Requires knowledges:
    → Polytheism
    → Writing
        → Vedism
    → Ceremonial Burial
    → Pastoralism
        → Mysticism

Horseback Riding

To research Horseback Riding, you need to research 4 other technologies first. The whole project will require 156 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Horsemen.
Allows to research:
    → Pastoralism
        → Exploration
            → Seafaring
            → Trade
        → Mysticism
            → Astrology
            → Hinduism
    → The Harness
        → Construction
            → Bridge Building
            → Martial Games
            → Mathematics
        → Saddle Stirrup
            → Chivalry
            → Slave Trade
Requires knowledges:
    → Fire Making
    → Stone Knapping
        → Animal Husbandry
    → Fire Making
    → Stone Knapping
        → Leather Tanning

Imperialism

To research Imperialism, you need to research 105 other technologies first. The whole project will require 112811 bulbs to complete. This number may vary depending on what other players research.

Only those who know Egalitarianism, First Republic, Martial Arts, Martial Games, Mathematics, Metallurgy, Seafaring, and Shogunate can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows government form Fascism (with Palace).
Requires knowledges:
    → Radio
    → Flight
        → Advanced Flight
    → Bushido
    → Industrialization
        → Zaibatsu

Industrialization

To research Industrialization, you need to research 70 other technologies first. The whole project will require 37859 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming, First Republic, Iron Working, Mysticism, Seafaring, The Wheel, and Theology can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Factory.
Allows to build Water Treatment.
Allows to build Eiffel Tower (with Culture 5500).
Allows to research:
    → Electricity
        → Chemical Synthesis
            → Machine Tools
            → Radioactivity
            → Refining
        → Cinematography
            → Mass Entertainment
        → Electromagnetism
            → Radio
            → Welding Technology
        → Steel
            → Concrete
            → Machine Tools
            → Refining
            → Turbine
    → Engineering
        → Optics
            → Electronics
            → Theory of Relativity
        → Radio
            → Advanced Flight
            → Electronics
            → Espionage
            → Theory of Relativity
        → Steel
            → Concrete
            → Machine Tools
            → Refining
            → Turbine
    → Federation
        → The Corporation
            → Communism
            → Logistics
            → Mass Entertainment
    → Labor Union
        → Concrete
            → Offshore Exploration
        → Guerilla Warfare
            → Communism
    → Zaibatsu
Requires knowledges:
    → Steam Engine
    → Metallurgy
        → Railroad
    → Banking
    → Egalitarianism
        → The Republic

Invention

To research Invention, you need to research 27 other technologies first. The whole project will require 4380 bulbs to complete. This number may vary depending on what other players research.

Only those who know Code of Laws and The Wheel can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.

Halves the upgrade cost of your units.

Allows to build Leonardo's Workshop (with Culture 3000).
Allows to research:
    → Gunpowder
        → Leadership
            → General Staff
        → Metallurgy
            → Explosives
            → General Staff
            → Railroad
        → Overseas Trade
            → Machinery
    → Navigation
        → Magnetism
            → Overseas Trade
            → Physics
    → Printing Press
        → Egalitarianism
            → Democracy
            → Socialism
            → The Republic
        → Theatre
            → Cinematography
Requires knowledges:
    → Simple Machines
    → Construction
        → Bridge Building
    → Literacy
    → Currency
        → First Republic

Iron Working

To research Iron Working, you need to research 14 other technologies first. The whole project will require 1160 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Legion.
Allows to research:
    → Construction
        → Bridge Building
            → Invention
            → Sanitation
        → Martial Games
            → Hastilude
        → Mathematics
            → Astrology
            → University
    → Feudalism
        → Chivalry
            → Bushido
            → Hastilude
        → Craft Guilds
            → Alchemy
        → Desert Code
            → Islam
        → Shogunate
            → Martial Arts
    → Simple Machines
        → Bridge Building
            → Invention
            → Sanitation
        → Mathematics
            → Astrology
            → University
Requires knowledges:
    → Copper Working
    → Carpentry
        → Bronze Working
    → Absolutism
    → Copper Working
        → Masonry

Islam

To research Islam, you need to research 36 other technologies first. The whole project will require 6083 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming and Monotheism can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Mosque (with Culture 1600 but no Church, Monk Monastery, or Temple of City God).
Allows to build Kaaba (with Mosque and Desert but no Temple, Church, Cathedral, Michelangelo's Chapel, J.S. Bach's Cathedral, King Richard's Crusade, Kyoto Fushimi Inari, Colossus, or Western Wall).
Allows to research:
→ Fundamentalism
→ Shiism
Requires knowledges:
    → Slave Trade
    → Feudalism
        → Desert Code
    → Vedism
    → Absolutism
        → Monotheism

Jainism

To research Jainism, you need to research 31 other technologies first. The whole project will require 5306 bulbs to complete. This number may vary depending on what other players research.

Only those who know Vedism can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Mahout Barracks (with Jungle).
Allows to build Khajuraho Temple (with Temple and Culture 3100 but no Kaaba, Michelangelo's Chapel, or J.S. Bach's Cathedral).
Requires knowledges:
    → Vedism
    → Mysticism
        → Hinduism
    → Mysticism
    → Mathematics
        → Astrology

Jet Propulsion

To research Jet Propulsion, you need to research 115 other technologies first. The whole project will require 184715 bulbs to complete. This number may vary depending on what other players research.

Only those who know Combustion, Communism, Electricity, Electronics, Literacy, and Steel can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Mobile Anti-Aircraft Gun.
Allows to build Jet Fighter.
Allows to build AWACS.
Allows to research:
    → Rocketry
        → Space Flight
            → Advanced Rocketry
            → Environmentalism
            → Satellite System
            → Stealth
Requires knowledges:
    → Television
    → Advanced Flight
        → Radar
    → Espionage
    → Welding Technology
        → Mobile Warfare

Labor Union

To research Labor Union, you need to research 72 other technologies first. The whole project will require 42803 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming, First Republic, Iron Working, Mysticism, Seafaring, The Wheel, and Theology can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.

Warning: Labor Union cancel Zaibatsu effect.

Allows to build Trade Union (with Factory and Culture 4100).
Allows to research:
    → Concrete
        → Offshore Exploration
            → Amphibious Warfare
            → Recycling
    → Guerilla Warfare
        → Communism
            → Espionage
Requires knowledges:
    → Egalitarianism
    → Machinery
        → Socialism
    → Railroad
    → The Republic
        → Industrialization

Laser

To research Laser, you need to research 124 other technologies first. The whole project will require 239435 bulbs to complete. This number may vary depending on what other players research.

Only those who know Egalitarianism, Electricity, Electronics, Literacy, Martial Games, Steel, Theory of Relativity, and University can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build SDI Defense.
Allows to build AEGIS Cruiser.
Requires knowledges:
    → Miniaturization
    → Television
        → Computers
    → Nuclear Fission
    → Recycling
        → Nuclear Power

Leadership

To research Leadership, you need to research 52 other technologies first. The whole project will require 14171 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming, Code of Laws, Iron Working, Martial Games, Mysticism, Polytheism, and The Wheel can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Corsairs.
Allows to build Streltsy.
Allows to build Cuirassiers.
Allows to research:
    → General Staff
        → Tactics
            → Chemical Synthesis
            → Guerilla Warfare
Requires knowledges:
    → Chivalry
    → Martial Games
        → Hastilude
    → Invention
    → Alchemy
        → Gunpowder

Leather Tanning

To research Leather Tanning, you need to research 2 other technologies first. The whole project will require 61 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Infantry Barracks I.
Allows to build Militia.
Allows to research:
    → Horseback Riding
        → Pastoralism
            → Exploration
            → Mysticism
        → The Harness
            → Construction
            → Saddle Stirrup
    → Sailing
        → Exploration
            → Seafaring
            → Trade
        → Map Making
            → Seafaring
    → Warrior Code
        → Copper Working
            → Bronze Working
            → Currency
            → Masonry
            → Saddle Stirrup
Requires knowledges:
→ Fire Making
→ Stone Knapping

Legalism

To research Legalism, you need to research 41 other technologies first. The whole project will require 8555 bulbs to complete. This number may vary depending on what other players research.

Only those who know Confucianism can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows government form Legalism (with Forbidden City).
Allows to build Temple of City God (with Temple and Culture 2700).
Allows to build Great Wall (with Culture 1500).
Requires knowledges:
    → Taoism
    → Buddhism
        → Confucianism
    → Simple Machines
    → Construction
        → Bridge Building

Literacy

To research Literacy, you need to research 12 other technologies first. The whole project will require 913 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Diplomat.
Allows to research:
    → First Republic
        → Banking
            → Economics
            → The Republic
        → Christianity
            → Theology
        → Invention
            → Gunpowder
            → Navigation
            → Printing Press
        → Thalassocracy
            → Magnetism
    → Paper Making
        → Printing Press
            → Egalitarianism
            → Theatre
        → Taoism
            → Confucianism
    → Philosophy
        → Medicine
            → Sanitation
            → University
        → Shiism
        → Taoism
            → Confucianism
        → Theology
            → Egalitarianism
            → Fundamentalism
Requires knowledges:
    → Alphabet
    → Pottery
        → Writing
    → Alphabet
    → Absolutism
        → Code of Laws

Logistics

To research Logistics, you need to research 96 other technologies first. The whole project will require 99275 bulbs to complete. This number may vary depending on what other players research.

Only those who know Egalitarianism, First Republic, Martial Games, Mathematics, Metallurgy, and Seafaring can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.

TIP: Enables second trade route with Post Office.

Allows to build Super Highways.
Allows to build Freight.
Allows to research:
    → Mass Production
        → Miniaturization
            → Computers
            → Plastics
            → Quantum Theory
            → Rocketry
Requires knowledges:
    → Federation
    → Refining
        → The Corporation
    → Combustion
    → Machine Tools
        → Automobile

Machinery

To research Machinery, you need to research 56 other technologies first. The whole project will require 21971 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming, Code of Laws, Iron Working, Mysticism, Polytheism, Seafaring, The Wheel, and Writing can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Textille Mill (with River).
Allows to research:
    → Socialism
        → Labor Union
            → Concrete
            → Guerilla Warfare
    → Steam Engine
        → Railroad
            → Industrialization
        → Screw Propeller
            → Flight
            → Turbine
Requires knowledges:
    → Astronomy
    → University
        → Theory of Gravity
    → Gunpowder
    → Magnetism
        → Overseas Trade

Machine Tools

To research Machine Tools, you need to research 88 other technologies first. The whole project will require 70571 bulbs to complete. This number may vary depending on what other players research.

Only those who know Egalitarianism, First Republic, Martial Games, Mathematics, Metallurgy, and Seafaring can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Infantry.
Allows to build Mounted Inf..
Allows to build AT Gun.
Allows to research:
    → Automobile
        → Logistics
            → Mass Production
        → Welding Technology
            → Mass Production
            → Mobile Warfare
Requires knowledges:
    → Engineering
    → Electricity
        → Steel
    → Electricity
    → Tactics
        → Chemical Synthesis

Magnetism

To research Magnetism, you need to research 45 other technologies first. The whole project will require 11435 bulbs to complete. This number may vary depending on what other players research.

Only those who know Code of Laws, Polytheism, and The Wheel can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Galleon.
Allows to build Frigate.
Allows to research:
    → Overseas Trade
        → Machinery
            → Socialism
            → Steam Engine
    → Physics
        → Atomic Theory
            → Electromagnetism
            → Radioactivity
        → Electricity
            → Chemical Synthesis
            → Cinematography
            → Electromagnetism
            → Steel
        → Optics
            → Electronics
            → Theory of Relativity
        → Screw Propeller
            → Flight
            → Turbine
Requires knowledges:
    → Invention
    → Astronomy
        → Navigation
    → Glass Working
    → First Republic
        → Thalassocracy

Map Making

To research Map Making, you need to research 7 other technologies first. The whole project will require 304 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Lighthouse (with 'Sea' terrain).
Allows to build Trireme.
Allows to research:
    → Seafaring
        → Direct Democracy
            → Glass Working
            → Philosophy
        → Shinto
            → Shogunate
Requires knowledges:
    → Creative Art
    → Stone Knapping
        → Alphabet
    → Forestry
    → Leather Tanning
        → Sailing

Martial Arts

To research Martial Arts, you need to research 40 other technologies first. The whole project will require 9050 bulbs to complete. This number may vary depending on what other players research.

Only those who know Confucianism can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Ninja Warriors.
Allows to research:
→ Bushido
→ Zaibatsu
Requires knowledges:
    → Shinto
    → Feudalism
        → Shogunate
    → Taoism
    → Buddhism
        → Confucianism

Martial Games

To research Martial Games, you need to research 22 other technologies first. The whole project will require 2724 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Colosseum (with Culture 850).
Allows to research:
    → Hastilude
        → Leadership
            → General Staff
        → Theatre
            → Cinematography
Requires knowledges:
    → Writing
    → Masonry
        → Drama
    → The Harness
    → Iron Working
        → Construction

Masonry

To research Masonry, you need to research 12 other technologies first. The whole project will require 762 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.

TIP: allow to upgrade Dirt Roads to Paved Roads.

Allows to build City Walls (absent Bunkers).
Allows to build Pyramids (with Culture 150).
Allows to research:
    → Drama
        → Martial Games
            → Hastilude
    → Iron Working
        → Construction
            → Bridge Building
            → Martial Games
            → Mathematics
        → Feudalism
            → Chivalry
            → Craft Guilds
            → Desert Code
            → Shogunate
        → Simple Machines
            → Bridge Building
            → Mathematics
Requires knowledges:
    → Agricultural Farming
    → Carpentry
        → Absolutism
    → Agricultural Farming
    → Warrior Code
        → Copper Working

Mass Entertainment

To research Mass Entertainment, you need to research 93 other technologies first. The whole project will require 86411 bulbs to complete. This number may vary depending on what other players research.

Only those who know Egalitarianism, First Republic, Literacy, Martial Games, Mathematics, Metallurgy, and Seafaring can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Amusement Park (with Culture 3800).
Allows to research:
    → Television
        → Computers
            → Command and Control
            → Laser
            → Robotics
            → Space Flight
        → Radar
            → Combined Arms
            → Jet Propulsion
Requires knowledges:
    → Theatre
    → Electricity
        → Cinematography
    → Federation
    → Refining
        → The Corporation

Mass Production

To research Mass Production, you need to research 100 other technologies first. The whole project will require 114827 bulbs to complete. This number may vary depending on what other players research.

Only those who know Egalitarianism, Martial Games, and Steel can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Mass Transit (with Railway Station).
Allows to build Diesel Barge.
Allows to build Battleship.
Allows to research:
    → Miniaturization
        → Computers
            → Command and Control
            → Laser
            → Robotics
            → Space Flight
        → Plastics
            → Stealth
            → Superconductors
        → Quantum Theory
            → Nuclear Fission
            → Superconductors
        → Rocketry
            → Space Flight
Requires knowledges:
    → Automobile
    → Electromagnetism
        → Welding Technology
    → The Corporation
    → Automobile
        → Logistics

Mathematics

To research Mathematics, you need to research 20 other technologies first. The whole project will require 2652 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Catapult.
Allows to research:
    → Astrology
        → Alchemy
            → Chemistry
            → Gunpowder
        → Astronomy
            → Navigation
            → Theory of Gravity
        → Jainism
    → University
        → Chemistry
            → Atomic Theory
            → Biology
            → Explosives
            → Steam Engine
        → Economics
            → Democracy
        → Metallurgy
            → Explosives
            → General Staff
            → Railroad
        → Theory of Gravity
            → Machinery
            → Physics
Requires knowledges:
    → The Harness
    → Iron Working
        → Construction
    → The Wheel
    → Iron Working
        → Simple Machines

Medicine

To research Medicine, you need to research 30 other technologies first. The whole project will require 4592 bulbs to complete. This number may vary depending on what other players research.

Only those who know Polytheism and Writing can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Lazaretto.
Allows to research:
    → Sanitation
        → Biology
            → Refrigeration
    → University
        → Chemistry
            → Atomic Theory
            → Biology
            → Explosives
            → Steam Engine
        → Economics
            → Democracy
        → Metallurgy
            → Explosives
            → General Staff
            → Railroad
        → Theory of Gravity
            → Machinery
            → Physics
Requires knowledges:
    → Direct Democracy
    → Literacy
        → Philosophy
    → Direct Democracy
    → Trade
        → Glass Working

Metallurgy

To research Metallurgy, you need to research 50 other technologies first. The whole project will require 14531 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming, Code of Laws, Iron Working, Mysticism, Polytheism, The Wheel, and Writing can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.

TIP: upgrade one obsolete unit per turn on cost of 1 veteran level (Warfare Museum will prevent this).

Allows to build Coastal Defense (with Oceanic terrain).
Allows to build Musketeers.
Allows to build Cannon.
Allows to research:
    → Explosives
        → Conscription
            → Tactics
        → Engineering
            → Optics
            → Radio
            → Steel
    → General Staff
        → Tactics
            → Chemical Synthesis
            → Guerilla Warfare
    → Railroad
        → Industrialization
            → Electricity
            → Engineering
            → Federation
            → Labor Union
            → Zaibatsu
Requires knowledges:
    → Invention
    → Alchemy
        → Gunpowder
    → Mathematics
    → Medicine
        → University

Miniaturization

To research Miniaturization, you need to research 104 other technologies first. The whole project will require 134363 bulbs to complete. This number may vary depending on what other players research.

Only those who know Egalitarianism, Martial Games, and Steel can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Research Lab (with University and Culture 6500 but no Steel Mill or Cement Plant).
Allows to research:
    → Computers
        → Command and Control
            → Modern Warfare
        → Laser
        → Robotics
            → Nanotechnology
        → Space Flight
            → Advanced Rocketry
            → Environmentalism
            → Satellite System
            → Stealth
    → Plastics
        → Stealth
        → Superconductors
            → Great Unification Theory
    → Quantum Theory
        → Nuclear Fission
            → Nuclear Power
        → Superconductors
            → Great Unification Theory
    → Rocketry
        → Space Flight
            → Advanced Rocketry
            → Environmentalism
            → Satellite System
            → Stealth
Requires knowledges:
    → Welding Technology
    → Logistics
        → Mass Production
    → Optics
    → Radio
        → Electronics

Mobile Warfare

To research Mobile Warfare, you need to research 105 other technologies first. The whole project will require 133451 bulbs to complete. This number may vary depending on what other players research.

Only those who know Combustion, Communism, and Steel can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Workshop Barracks (with Oil Refinery).
Allows to build Technical.
Allows to build Mech. Inf..
Allows to research:
    → Amphibious Warfare
        → Combined Arms
            → Command and Control
    → Jet Propulsion
        → Rocketry
            → Space Flight
    → Robotics
        → Nanotechnology
            → Genetic Engineering
Requires knowledges:
    → Communism
    → Radio
        → Espionage
    → Automobile
    → Electromagnetism
        → Welding Technology

Theatre

To research Theatre, you need to research 39 other technologies first. The whole project will require 9818 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming, Code of Laws, Literacy, Martial Games, and The Wheel can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Theatre Stage (with Culture 3900).
Allows to build Shakespeare's Theater (with Culture 7500).
Allows to research:
    → Cinematography
        → Mass Entertainment
            → Television
Requires knowledges:
    → Chivalry
    → Martial Games
        → Hastilude
    → Paper Making
    → Invention
        → Printing Press

Modern Warfare

To research Modern Warfare, you need to research 129 other technologies first. The whole project will require 326651 bulbs to complete. This number may vary depending on what other players research.

Only those who know Combustion, Communism, Electricity, Electronics, Flight, Literacy, and Steel can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Modern Rangers.
Allows to build Reactive Armor.
Allows to build Hovercraft.
Requires knowledges:
    → Combined Arms
    → Computers
        → Command and Control
    → Space Flight
    → Theory of Relativity
        → Satellite System

Monarchy

To research Monarchy, you need to research 13 other technologies first. The whole project will require 951 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows government form Monarchy (with Palace).
Allows to research:
    → Feudalism
        → Chivalry
            → Bushido
            → Hastilude
        → Craft Guilds
            → Alchemy
        → Desert Code
            → Islam
        → Shogunate
            → Martial Arts
    → Paper Making
        → Printing Press
            → Egalitarianism
            → Theatre
        → Taoism
            → Confucianism
Requires knowledges:
    → Shamanism
    → Alphabet
        → Ceremonial Burial
    → Alphabet
    → Absolutism
        → Code of Laws

Monotheism

To research Monotheism, you need to research 15 other technologies first. The whole project will require 1479 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.

Warning: Disables Rapture Growth (except of the city with Khajuraho wonder).

Allows to build Western Wall (with City Walls but no Colossus or Kaaba).
Allows to research:
    → Christianity
        → Theology
            → Egalitarianism
            → Fundamentalism
    → Islam
        → Fundamentalism
        → Shiism
Requires knowledges:
    → Polytheism
    → Writing
        → Vedism
    → Agricultural Farming
    → Carpentry
        → Absolutism

Mysticism

To research Mysticism, you need to research 12 other technologies first. The whole project will require 653 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.

Improves the effect of Temples.

Allows to build Temple of Artemis (with Temple and Culture 180).
Allows to research:
    → Astrology
        → Alchemy
            → Chemistry
            → Gunpowder
        → Astronomy
            → Navigation
            → Theory of Gravity
        → Jainism
    → Hinduism
        → Jainism
Requires knowledges:
    → Shamanism
    → Alphabet
        → Ceremonial Burial
    → Horseback Riding
    → Pottery
        → Pastoralism

Nanotechnology

To research Nanotechnology, you need to research 136 other technologies first. The whole project will require 349403 bulbs to complete. This number may vary depending on what other players research.

Only those who know Combustion, Communism, Electricity, Electronics, Flight, Literacy, Miniaturization, Nuclear Fission, and University can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Space Structural (with Factory, University, Research Lab, and Space Lift).
Allows to build Space Lift (with Research Lab, Apollo Program, and Culture 18500).
Allows to build Drone.
Allows to research:
→ Genetic Engineering
Requires knowledges:
    → Mobile Warfare
    → Computers
        → Robotics
    → Space Flight
    → Nuclear Power
        → Advanced Rocketry

To research Navigation, you need to research 43 other technologies first. The whole project will require 9467 bulbs to complete. This number may vary depending on what other players research.

Only those who know Code of Laws, Polytheism, and The Wheel can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Magellan's Expedition (with 'Sea' terrain and Culture 2800).
Allows to build Caravel.
Allows to build Brig.
Allows to research:
    → Magnetism
        → Overseas Trade
            → Machinery
        → Physics
            → Atomic Theory
            → Electricity
            → Optics
            → Screw Propeller
Requires knowledges:
    → Bridge Building
    → First Republic
        → Invention
    → Astrology
    → Glass Working
        → Astronomy

Nuclear Fission

To research Nuclear Fission, you need to research 108 other technologies first. The whole project will require 160955 bulbs to complete. This number may vary depending on what other players research.

Only those who know Egalitarianism, Martial Games, Steel, and Theory of Relativity can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Manhattan Project (with Culture 11800 and Uranium).
Allows to build Atomic Bomb.
Allows to research:
    → Nuclear Power
        → Advanced Rocketry
            → Nanotechnology
        → Laser
Requires knowledges:
    → Optics
    → Radio
        → Theory of Relativity
    → Radioactivity
    → Miniaturization
        → Quantum Theory

Nuclear Power

To research Nuclear Power, you need to research 118 other technologies first. The whole project will require 201803 bulbs to complete. This number may vary depending on what other players research.

Only those who know Egalitarianism, Martial Games, Steel, Theory of Relativity, and University can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.

Gives sea units one extra move.

Allows to build Nuclear Plant (with Factory and Culture 13000).
Allows to build Nuclear Submarine.
Allows to research:
    → Advanced Rocketry
        → Nanotechnology
            → Genetic Engineering
    → Laser
Requires knowledges:
    → Theory of Relativity
    → Quantum Theory
        → Nuclear Fission
    → Offshore Exploration
    → Biotechnology
        → Recycling

Offshore Exploration

To research Offshore Exploration, you need to research 81 other technologies first. The whole project will require 68915 bulbs to complete. This number may vary depending on what other players research.

Only those who know First Republic, Mathematics, Metallurgy, Seafaring, and Theology can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.

Allows embarked Settlers, Migrants, Workers, Engineers or Transports and Barges to build oil platforms on Deep Ocean, required to get the bonus from Offshore Platforms.

Allows to build Offshore Platform (with Oil Refinery and Oceanic terrain).
Allows to build Port Facility (with Oceanic terrain).
Allows to build Hoover Dam (with River and Factory).
Allows to research:
    → Amphibious Warfare
        → Combined Arms
            → Command and Control
    → Recycling
        → Environmentalism
        → Nuclear Power
            → Advanced Rocketry
            → Laser
Requires knowledges:
    → Steel
    → Labor Union
        → Concrete
    → Steel
    → Screw Propeller
        → Turbine

Optics

To research Optics, you need to research 74 other technologies first. The whole project will require 48131 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming, First Republic, Iron Working, Mathematics, Mysticism, Seafaring, The Wheel, and Theology can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to research:
    → Electronics
        → Miniaturization
            → Computers
            → Plastics
            → Quantum Theory
            → Rocketry
        → Television
            → Computers
            → Radar
    → Theory of Relativity
        → Great Unification Theory
        → Nuclear Fission
            → Nuclear Power
        → Satellite System
            → Modern Warfare
Requires knowledges:
    → Industrialization
    → Explosives
        → Engineering
    → Theory of Gravity
    → Magnetism
        → Physics

Overseas Trade

To research Overseas Trade, you need to research 51 other technologies first. The whole project will require 16067 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming, Code of Laws, Iron Working, Mysticism, Polytheism, Seafaring, and The Wheel can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.

Enhanced range of territoral waters.

Allows to build Clipper.
Allows to build Flagship Frigate.
Allows to build Pirates.
Allows to research:
    → Machinery
        → Socialism
            → Labor Union
        → Steam Engine
            → Railroad
            → Screw Propeller
Requires knowledges:
    → Invention
    → Alchemy
        → Gunpowder
    → Navigation
    → Thalassocracy
        → Magnetism

Paper Making

To research Paper Making, you need to research 16 other technologies first. The whole project will require 1647 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Great Library (with Library and Culture 2500).
Allows to research:
    → Printing Press
        → Egalitarianism
            → Democracy
            → Socialism
            → The Republic
        → Theatre
            → Cinematography
    → Taoism
        → Confucianism
            → Martial Arts
Requires knowledges:
    → Writing
    → Code of Laws
        → Literacy
    → Ceremonial Burial
    → Code of Laws
        → Monarchy

Pastoralism

To research Pastoralism, you need to research 7 other technologies first. The whole project will require 337 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Migrants.
Allows to research:
    → Exploration
        → Seafaring
            → Direct Democracy
            → Shinto
        → Trade
            → Banking
            → Glass Working
            → Slave Trade
    → Mysticism
        → Astrology
            → Alchemy
            → Astronomy
            → Jainism
        → Hinduism
            → Jainism
Requires knowledges:
    → Animal Husbandry
    → Leather Tanning
        → Horseback Riding
    → Forestry
        → Pottery

Philosophy

To research Philosophy, you need to research 24 other technologies first. The whole project will require 2663 bulbs to complete. This number may vary depending on what other players research.

Only those who know Polytheism and Writing can acquire this technology (by any means).
The first player to learn Philosophy gets an immediate research advance.
To preserve this technology for our nation some bulbs are needed each turn.
Allows to research:
    → Medicine
        → Sanitation
            → Biology
        → University
            → Chemistry
            → Economics
            → Metallurgy
            → Theory of Gravity
    → Shiism
    → Taoism
        → Confucianism
            → Martial Arts
    → Theology
        → Egalitarianism
            → Democracy
            → Socialism
            → The Republic
        → Fundamentalism
Requires knowledges:
    → Polytheism
    → Seafaring
        → Direct Democracy
    → Writing
    → Code of Laws
        → Literacy

Physics

To research Physics, you need to research 50 other technologies first. The whole project will require 17339 bulbs to complete. This number may vary depending on what other players research.

Only those who know Code of Laws, Mathematics, Polytheism, The Wheel, and Writing can acquire this technology (by any means).
The first player to learn Physics gets an immediate research advance.
To preserve this technology for our nation some bulbs are needed each turn.
Allows to research:
    → Atomic Theory
        → Electromagnetism
            → Radio
            → Welding Technology
        → Radioactivity
            → Biotechnology
            → Quantum Theory
    → Electricity
        → Chemical Synthesis
            → Machine Tools
            → Radioactivity
            → Refining
        → Cinematography
            → Mass Entertainment
        → Electromagnetism
            → Radio
            → Welding Technology
        → Steel
            → Concrete
            → Machine Tools
            → Refining
            → Turbine
    → Optics
        → Electronics
            → Miniaturization
            → Television
        → Theory of Relativity
            → Great Unification Theory
            → Nuclear Fission
            → Satellite System
    → Screw Propeller
        → Flight
            → Advanced Flight
        → Turbine
            → Combustion
            → Offshore Exploration
Requires knowledges:
    → Astronomy
    → University
        → Theory of Gravity
    → Navigation
    → Thalassocracy
        → Magnetism

Plastics

To research Plastics, you need to research 107 other technologies first. The whole project will require 152075 bulbs to complete. This number may vary depending on what other players research.

Only those who know Egalitarianism, Martial Games, and Steel can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Mfg. Plant (with Factory).
Allows to research:
    → Stealth
    → Superconductors
        → Great Unification Theory
Requires knowledges:
    → Mass Production
    → Electronics
        → Miniaturization
    → Radio
    → Flight
        → Advanced Flight

Polytheism

To research Polytheism, you need to research 10 other technologies first. The whole project will require 534 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Statue of Zeus (with Culture 900 but no Church, Cathedral, Mosque, or Kaaba).
Allows to research:
    → Direct Democracy
        → Glass Working
            → Astronomy
            → Craft Guilds
            → Medicine
            → Thalassocracy
        → Philosophy
            → Medicine
            → Shiism
            → Taoism
            → Theology
    → Vedism
        → Buddhism
            → Confucianism
            → Shinto
        → Hinduism
            → Jainism
        → Monotheism
            → Christianity
            → Islam
Requires knowledges:
    → Animal Husbandry
    → Pottery
        → Agricultural Farming
    → Shamanism
    → Alphabet
        → Ceremonial Burial

Pottery

To research Pottery, you need to research 3 other technologies first. The whole project will require 118 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Granary.
Allows to build Hanging Gardens.
Allows to research:
    → Agricultural Farming
        → Absolutism
            → Code of Laws
            → Masonry
            → Monotheism
        → Copper Working
            → Bronze Working
            → Currency
            → Masonry
            → Saddle Stirrup
        → Polytheism
            → Direct Democracy
            → Vedism
    → Pastoralism
        → Exploration
            → Seafaring
            → Trade
        → Mysticism
            → Astrology
            → Hinduism
    → The Wheel
        → Buddhism
            → Confucianism
            → Shinto
        → Simple Machines
            → Bridge Building
            → Mathematics
        → The Harness
            → Construction
            → Saddle Stirrup
    → Writing
        → Currency
            → First Republic
            → Trade
        → Drama
            → Martial Games
        → Literacy
            → First Republic
            → Paper Making
            → Philosophy
        → Vedism
            → Buddhism
            → Hinduism
            → Monotheism
Requires knowledges:
    → Stone Knapping
    → Fire Making
        → Forestry

Printing Press

To research Printing Press, you need to research 32 other technologies first. The whole project will require 5930 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming, Code of Laws, and The Wheel can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to research:
    → Egalitarianism
        → Democracy
            → Conscription
            → Federation
        → Socialism
            → Labor Union
        → The Republic
            → Industrialization
    → Theatre
        → Cinematography
            → Mass Entertainment
Requires knowledges:
    → Literacy
    → Monarchy
        → Paper Making
    → Bridge Building
    → First Republic
        → Invention

Quantum Theory

To research Quantum Theory, you need to research 106 other technologies first. The whole project will require 144971 bulbs to complete. This number may vary depending on what other players research.

Only those who know Egalitarianism, Martial Games, and Steel can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to research:
    → Nuclear Fission
        → Nuclear Power
            → Advanced Rocketry
            → Laser
    → Superconductors
        → Great Unification Theory
Requires knowledges:
    → Atomic Theory
    → Chemical Synthesis
        → Radioactivity
    → Mass Production
    → Electronics
        → Miniaturization

Radar

To research Radar, you need to research 105 other technologies first. The whole project will require 136907 bulbs to complete. This number may vary depending on what other players research.

Only those who know Egalitarianism, Electricity, Electronics, Literacy, Martial Games, and Metallurgy can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.

Increases vision radius of Sea and Air units.

Allows to build Airport.
Allows to build Strike Aircraft.
Allows to build GBU.
Allows to research:
    → Combined Arms
        → Command and Control
            → Modern Warfare
    → Jet Propulsion
        → Rocketry
            → Space Flight
Requires knowledges:
    → Mass Entertainment
    → Electronics
        → Television
    → Radio
    → Flight
        → Advanced Flight

Radio

To research Radio, you need to research 77 other technologies first. The whole project will require 56627 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming, First Republic, Iron Working, Mathematics, Mysticism, Seafaring, The Wheel, and Theology can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.

Allows Workers and Engineers to build airbases and buoys.

Allows to build Atlantic Telegraph Company (with Post Office).
Allows to research:
    → Advanced Flight
        → Plastics
            → Stealth
            → Superconductors
        → Radar
            → Combined Arms
            → Jet Propulsion
    → Electronics
        → Miniaturization
            → Computers
            → Plastics
            → Quantum Theory
            → Rocketry
        → Television
            → Computers
            → Radar
    → Espionage
        → Mobile Warfare
            → Amphibious Warfare
            → Jet Propulsion
            → Robotics
    → Theory of Relativity
        → Great Unification Theory
        → Nuclear Fission
            → Nuclear Power
        → Satellite System
            → Modern Warfare
Requires knowledges:
    → Industrialization
    → Explosives
        → Engineering
    → Electricity
    → Atomic Theory
        → Electromagnetism

Radioactivity

To research Radioactivity, you need to research 87 other technologies first. The whole project will require 66587 bulbs to complete. This number may vary depending on what other players research.

Only those who know Egalitarianism, First Republic, Iron Working, Martial Games, Mathematics, Mysticism, and Seafaring can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Mobile X-ray (with Hospital and Culture 6200).
Allows to research:
    → Biotechnology
        → Genetic Engineering
        → Recycling
            → Environmentalism
            → Nuclear Power
    → Quantum Theory
        → Nuclear Fission
            → Nuclear Power
        → Superconductors
            → Great Unification Theory
Requires knowledges:
    → Chemistry
    → Physics
        → Atomic Theory
    → Electricity
    → Tactics
        → Chemical Synthesis

Railroad

To research Railroad, you need to research 60 other technologies first. The whole project will require 29171 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming, Code of Laws, Iron Working, Mysticism, Polytheism, Seafaring, The Wheel, and Writing can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.

Allows Engineers, Builders and other Worker-type units to upgrade roads to Railroads.

For Despotism or Tribal governments, cancels the penalty to worked tiles with output greater than 2 (as if all your cities were always celebrating).

Allows to build Railway Station.
Allows to build Train.
Allows to build Armoured Train.
Allows to research:
    → Industrialization
        → Electricity
            → Chemical Synthesis
            → Cinematography
            → Electromagnetism
            → Steel
        → Engineering
            → Optics
            → Radio
            → Steel
        → Federation
            → The Corporation
        → Labor Union
            → Concrete
            → Guerilla Warfare
        → Zaibatsu
Requires knowledges:
    → Chemistry
    → Machinery
        → Steam Engine
    → Gunpowder
    → University
        → Metallurgy

Recycling

To research Recycling, you need to research 101 other technologies first. The whole project will require 110171 bulbs to complete. This number may vary depending on what other players research.

Only those who know Egalitarianism, First Republic, Martial Games, Mathematics, Metallurgy, Seafaring, and University can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.

Allows irrigation tiles not adjacent to any water source.

Allows to build Recycling Center.
Allows to research:
    → Environmentalism
    → Nuclear Power
        → Advanced Rocketry
            → Nanotechnology
        → Laser
Requires knowledges:
    → Concrete
    → Turbine
        → Offshore Exploration
    → Radioactivity
    → Refrigeration
        → Biotechnology

Refining

To research Refining, you need to research 88 other technologies first. The whole project will require 70475 bulbs to complete. This number may vary depending on what other players research.

Only those who know Egalitarianism, First Republic, Martial Games, Mathematics, Metallurgy, and Seafaring can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.

Allows any Worker-type units to upgrade minings to oil wells on Desert and Glacier tiles, for an extra production point.

Allows to build Oil Refinery.
Allows to build Engineers.
Allows to research:
    → Combustion
        → Automobile
            → Logistics
            → Welding Technology
        → Flight
            → Advanced Flight
    → Refrigeration
        → Biotechnology
            → Genetic Engineering
            → Recycling
    → The Corporation
        → Communism
            → Espionage
        → Logistics
            → Mass Production
        → Mass Entertainment
            → Television
Requires knowledges:
    → Electricity
    → Tactics
        → Chemical Synthesis
    → Engineering
    → Electricity
        → Steel

Refrigeration

To research Refrigeration, you need to research 91 other technologies first. The whole project will require 77243 bulbs to complete. This number may vary depending on what other players research.

Only those who know Egalitarianism, First Republic, Martial Games, Mathematics, Metallurgy, Seafaring, and University can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Supermarket (with Marketplace).
Allows to research:
    → Biotechnology
        → Genetic Engineering
        → Recycling
            → Environmentalism
            → Nuclear Power
Requires knowledges:
    → Sanitation
    → Chemistry
        → Biology
    → Chemical Synthesis
    → Steel
        → Refining

Robotics

To research Robotics, you need to research 116 other technologies first. The whole project will require 193019 bulbs to complete. This number may vary depending on what other players research.

Only those who know Combustion, Communism, Electricity, Electronics, Literacy, and Miniaturization can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Internet (with Research Lab, DARPA, and Culture 13500).
Allows to build Self-propelled Gun.
Allows to build Self-propelled Howitzer.
Allows to research:
→ Nanotechnology
→ Genetic Engineering
Requires knowledges:
    → Espionage
    → Welding Technology
        → Mobile Warfare
    → Miniaturization
    → Television
        → Computers

Rocketry

To research Rocketry, you need to research 119 other technologies first. The whole project will require 213755 bulbs to complete. This number may vary depending on what other players research.

Only those who know Combustion, Communism, Electricity, Electronics, Flight, Literacy, and Steel can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build SAM Battery.
Allows to build Strike Jet.
Allows to build Missile.
Allows to research:
    → Space Flight
        → Advanced Rocketry
            → Nanotechnology
        → Environmentalism
        → Satellite System
            → Modern Warfare
        → Stealth
Requires knowledges:
    → Radar
    → Mobile Warfare
        → Jet Propulsion
    → Mass Production
    → Electronics
        → Miniaturization

Saddle Stirrup

To research Saddle Stirrup, you need to research 14 other technologies first. The whole project will require 1041 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Stables Barracks.
Allows to build Mounted Archery.
Allows to research:
    → Chivalry
        → Bushido
            → Zaibatsu
        → Hastilude
            → Leadership
            → Theatre
    → Slave Trade
        → Desert Code
            → Islam
Requires knowledges:
    → Horseback Riding
    → The Wheel
        → The Harness
    → Agricultural Farming
    → Warrior Code
        → Copper Working

Sailing

To research Sailing, you need to research 4 other technologies first. The whole project will require 146 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Kon-Tiki Raft.
Allows to research:
    → Exploration
        → Seafaring
            → Direct Democracy
            → Shinto
        → Trade
            → Banking
            → Glass Working
            → Slave Trade
    → Map Making
        → Seafaring
            → Direct Democracy
            → Shinto
Requires knowledges:
    → Stone Knapping
    → Fire Making
        → Forestry
    → Fire Making
    → Stone Knapping
        → Leather Tanning

Sanitation

To research Sanitation, you need to research 39 other technologies first. The whole project will require 7595 bulbs to complete. This number may vary depending on what other players research.

Only those who know Polytheism and Writing can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Sewer System (with Size 9).
Allows to research:
    → Biology
        → Refrigeration
            → Biotechnology
Requires knowledges:
    → Simple Machines
    → Construction
        → Bridge Building
    → Philosophy
    → Glass Working
        → Medicine

Satellite System

To research Satellite System, you need to research 123 other technologies first. The whole project will require 259451 bulbs to complete. This number may vary depending on what other players research.

Only those who know Combustion, Communism, Electricity, Electronics, Flight, Literacy, and Steel can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.

Increases unit vision radius, except of Air and Sea units.

Allows to build Global Positioning System (with Apollo Program, Research Lab, and Culture 16500).
Allows to research:
→ Modern Warfare
Requires knowledges:
    → Computers
    → Rocketry
        → Space Flight
    → Optics
    → Radio
        → Theory of Relativity

Screw Propeller

To research Screw Propeller, you need to research 60 other technologies first. The whole project will require 29795 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming, Code of Laws, Iron Working, Mathematics, Mysticism, Polytheism, Seafaring, The Wheel, and Writing can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Monitor.
Allows to build Ironclad.
Allows to research:
    → Flight
        → Advanced Flight
            → Plastics
            → Radar
    → Turbine
        → Combustion
            → Automobile
            → Flight
        → Offshore Exploration
            → Amphibious Warfare
            → Recycling
Requires knowledges:
    → Chemistry
    → Machinery
        → Steam Engine
    → Theory of Gravity
    → Magnetism
        → Physics

Seafaring

To research Seafaring, you need to research 13 other technologies first. The whole project will require 936 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Harbor (with 'Sea' terrain but no Port Facility).
Allows to build Galley.
Allows to build Longboat.
Allows to research:
    → Direct Democracy
        → Glass Working
            → Astronomy
            → Craft Guilds
            → Medicine
            → Thalassocracy
        → Philosophy
            → Medicine
            → Shiism
            → Taoism
            → Theology
    → Shinto
        → Shogunate
            → Martial Arts
Requires knowledges:
    → Pastoralism
    → Sailing
        → Exploration
    → Alphabet
    → Sailing
        → Map Making

Shamanism

To research Shamanism, you need to research 2 other technologies first. The whole project will require 71 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Sacred Cairn.
Allows to research:
    → Ceremonial Burial
        → Monarchy
            → Feudalism
            → Paper Making
        → Mysticism
            → Astrology
            → Hinduism
        → Polytheism
            → Direct Democracy
            → Vedism
Requires knowledges:
→ Fire Making
→ Creative Art

Shiism

To research Shiism, you need to research 42 other technologies first. The whole project will require 8387 bulbs to complete. This number may vary depending on what other players research.

Only those who know Islam, Polytheism, and Writing can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Taj Mahal (with Mosque and Culture 2800 but no Temple, Church, Michelangelo's Chapel, King Richard's Crusade, or Temple of City God).
Requires knowledges:
    → Desert Code
    → Monotheism
        → Islam
    → Direct Democracy
    → Literacy
        → Philosophy

Shinto

To research Shinto, you need to research 23 other technologies first. The whole project will require 2750 bulbs to complete. This number may vary depending on what other players research.

Only those who know Vedism can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Shrine Torii (with Temple and Culture 1300 but no Church or Mosque).
Allows to research:
    → Shogunate
        → Martial Arts
            → Bushido
Requires knowledges:
    → Exploration
    → Map Making
        → Seafaring
    → Vedism
    → The Wheel
        → Buddhism

Shogunate

To research Shogunate, you need to research 33 other technologies first. The whole project will require 5186 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming and Vedism can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Osaka Castle (with Temple, Shrine Torii, and Culture 2900 but no Ecclesiastical Palace, Angkor Wat, Forbidden City, Sultan Palace, or Palace).
Allows to build Samurai.
Allows to research:
    → Martial Arts
        → Bushido
            → Zaibatsu
Requires knowledges:
    → Seafaring
    → Buddhism
        → Shinto
    → Iron Working
    → Monarchy
        → Feudalism

Sikhism

To research Sikhism, you need to research 50 other technologies first. The whole project will require 12851 bulbs to complete. This number may vary depending on what other players research.

Only those who know Islam, Polytheism, Vedism, and Writing can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Golden Temple (with Temple and Culture 4500).
Requires knowledges:
    → Hinduism
    → Astrology
        → Jainism
    → Islam
    → Philosophy
        → Shiism

Simple Machines

To research Simple Machines, you need to research 16 other technologies first. The whole project will require 1592 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Arbalest.
Allows to build Ballista.
Allows to research:
    → Bridge Building
        → Invention
            → Gunpowder
            → Navigation
            → Printing Press
        → Sanitation
            → Biology
    → Mathematics
        → Astrology
            → Alchemy
            → Astronomy
            → Jainism
        → University
            → Chemistry
            → Economics
            → Metallurgy
            → Theory of Gravity
Requires knowledges:
    → Carpentry
    → Pottery
        → The Wheel
    → Bronze Working
    → Masonry
        → Iron Working

Slave Trade

To research Slave Trade, you need to research 22 other technologies first. The whole project will require 2346 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Yasir (with Marketplace).
Allows to build Slave.
Allows to research:
    → Desert Code
        → Islam
            → Fundamentalism
            → Shiism
Requires knowledges:
    → The Harness
    → Copper Working
        → Saddle Stirrup
    → Currency
    → Exploration
        → Trade

Socialism

To research Socialism, you need to research 64 other technologies first. The whole project will require 28355 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming, Iron Working, Mysticism, Seafaring, The Wheel, and Theology can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Police Station.
Allows to research:
    → Labor Union
        → Concrete
            → Offshore Exploration
        → Guerilla Warfare
            → Communism
Requires knowledges:
    → Theology
    → Printing Press
        → Egalitarianism
    → Theory of Gravity
    → Overseas Trade
        → Machinery

Space Flight

To research Space Flight, you need to research 121 other technologies first. The whole project will require 235643 bulbs to complete. This number may vary depending on what other players research.

Only those who know Combustion, Communism, Electricity, Electronics, Flight, Literacy, and Steel can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Apollo Program (with Research Lab and Culture 12000).
Allows to build Jetliner.
Allows to research:
    → Advanced Rocketry
        → Nanotechnology
            → Genetic Engineering
    → Environmentalism
    → Satellite System
        → Modern Warfare
    → Stealth
Requires knowledges:
    → Miniaturization
    → Television
        → Computers
    → Jet Propulsion
    → Miniaturization
        → Rocketry

Stealth

To research Stealth, you need to research 123 other technologies first. The whole project will require 259835 bulbs to complete. This number may vary depending on what other players research.

Only those who know Combustion, Communism, Electricity, Electronics, Flight, Literacy, and Steel can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Stealth Fighter.
Allows to build Stealth Bomber.
Requires knowledges:
    → Miniaturization
    → Advanced Flight
        → Plastics
    → Computers
    → Rocketry
        → Space Flight

Steam Engine

To research Steam Engine, you need to research 58 other technologies first. The whole project will require 25523 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming, Code of Laws, Iron Working, Mysticism, Polytheism, Seafaring, The Wheel, and Writing can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.

Allows Settlers, Migrants, Workers and Engineers to build Water Locks.

Allows to build Darwin's Voyage (with Culture 7800).
Allows to build Steam Barge.
Allows to build Paddle Steamer.
Allows to research:
    → Railroad
        → Industrialization
            → Electricity
            → Engineering
            → Federation
            → Labor Union
            → Zaibatsu
    → Screw Propeller
        → Flight
            → Advanced Flight
        → Turbine
            → Combustion
            → Offshore Exploration
Requires knowledges:
    → University
    → Alchemy
        → Chemistry
    → Theory of Gravity
    → Overseas Trade
        → Machinery

Steel

To research Steel, you need to research 75 other technologies first. The whole project will require 50579 bulbs to complete. This number may vary depending on what other players research.

Only those who know First Republic, Mathematics, Metallurgy, Seafaring, and Theology can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.

Allows Engineers and barges to build Road Bridges over Lakes or Ocean (bridge need to be adjancent to coast)

Allows to build Steel Mill (with Railway Station, Factory, and Coal but no Research Lab).
Allows to build Freighter.
Allows to research:
    → Concrete
        → Offshore Exploration
            → Amphibious Warfare
            → Recycling
    → Machine Tools
        → Automobile
            → Logistics
            → Welding Technology
    → Refining
        → Combustion
            → Automobile
            → Flight
        → Refrigeration
            → Biotechnology
        → The Corporation
            → Communism
            → Logistics
            → Mass Entertainment
    → Turbine
        → Combustion
            → Automobile
            → Flight
        → Offshore Exploration
            → Amphibious Warfare
            → Recycling
Requires knowledges:
    → Industrialization
    → Explosives
        → Engineering
    → Industrialization
    → Physics
        → Electricity

Stone Knapping

To research Stone Knapping, it would need 14 bulbs. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Moai Statues (with 'Sea' terrain and Culture 10).
Allows to build Hunters.
Allows to research:
    → Alphabet
        → Ceremonial Burial
            → Monarchy
            → Mysticism
            → Polytheism
        → Code of Laws
            → Literacy
            → Monarchy
        → Map Making
            → Seafaring
        → Writing
            → Currency
            → Drama
            → Literacy
            → Vedism
    → Animal Husbandry
        → Agricultural Farming
            → Absolutism
            → Copper Working
            → Polytheism
        → Horseback Riding
            → Pastoralism
            → The Harness
    → Forestry
        → Carpentry
            → Absolutism
            → Bronze Working
            → The Wheel
        → Pottery
            → Agricultural Farming
            → Pastoralism
            → The Wheel
            → Writing
        → Sailing
            → Exploration
            → Map Making
    → Leather Tanning
        → Horseback Riding
            → Pastoralism
            → The Harness
        → Sailing
            → Exploration
            → Map Making
        → Warrior Code
            → Copper Working\

Sunnism

To research Sunnism, you need to research 57 other technologies first. The whole project will require 17411 bulbs to complete. This number may vary depending on what other players research.

Only those who know Code of Laws, Iron Working, Islam, Mysticism, Polytheism, The Wheel, and Writing can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Sultan Palace (with Mosque, Madrasa, and Culture 3900 but no Ecclesiastical Palace, Angkor Wat, Forbidden City, Osaka Castle, or Palace).
Allows to build Thermal Bath.
Allows to build Janissaries.
Requires knowledges:
    → Theology
    → Islam
        → Fundamentalism
    → Invention
    → Alchemy
        → Gunpowder

Superconductors

To research Superconductors, you need to research 110 other technologies first. The whole project will require 176843 bulbs to complete. This number may vary depending on what other players research.

Only those who know Egalitarianism, Martial Games, and Steel can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.

Allows Settlers, Migrants, Workers and Engineers to upgrade railroads with maglev.

Allows to build Large Hadron Collider (with Culture 25000).
Allows to research:
→ Great Unification Theory
Requires knowledges:
    → Radioactivity
    → Miniaturization
        → Quantum Theory
    → Miniaturization
    → Advanced Flight
        → Plastics

Super Soldiers

To research Super Soldiers, you need to research 143 other technologies first. The whole project will require 494699 bulbs to complete. This number may vary depending on what other players research.

Only those who know Amphibious Warfare, Electricity, Electronics, Flight, Literacy, Miniaturization, Nuclear Fission, and University can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Super Soldiers.
Requires knowledges:
    → Biotechnology
    → Nanotechnology
        → Genetic Engineering
    → Command and Control
    → Satellite System
        → Modern Warfare

Tactics

To research Tactics, you need to research 71 other technologies first. The whole project will require 36011 bulbs to complete. This number may vary depending on what other players research.

Only those who know Egalitarianism, Iron Working, Martial Games, and Mysticism can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Ecole Speciale Militaire (with Culture 6800).
Allows to build Alpine Troops.
Allows to build Dragoons.
Allows to research:
    → Chemical Synthesis
        → Machine Tools
            → Automobile
        → Radioactivity
            → Biotechnology
            → Quantum Theory
        → Refining
            → Combustion
            → Refrigeration
            → The Corporation
    → Guerilla Warfare
        → Communism
            → Espionage
Requires knowledges:
    → Democracy
    → Explosives
        → Conscription
    → Leadership
    → Metallurgy
        → General Staff

Television

To research Television, you need to research 99 other technologies first. The whole project will require 110459 bulbs to complete. This number may vary depending on what other players research.

Only those who know Egalitarianism, Electricity, Literacy, Martial Games, and Metallurgy can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.

TIP: Together with Hollywood wonder, 3 additional entertainer specialists for each city.

Allows to research:
    → Computers
        → Command and Control
            → Modern Warfare
        → Laser
        → Robotics
            → Nanotechnology
        → Space Flight
            → Advanced Rocketry
            → Environmentalism
            → Satellite System
            → Stealth
    → Radar
        → Combined Arms
            → Command and Control
        → Jet Propulsion
            → Rocketry
Requires knowledges:
    → Cinematography
    → The Corporation
        → Mass Entertainment
    → Optics
    → Radio
        → Electronics

Taoism

To research Taoism, you need to research 27 other technologies first. The whole project will require 3911 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming, Literacy, Polytheism, and Writing can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Junk.
Allows to research:
    → Confucianism
        → Martial Arts
            → Bushido
Requires knowledges:
    → Literacy
    → Monarchy
        → Paper Making
    → Direct Democracy
    → Literacy
        → Philosophy

Thalassocracy

To research Thalassocracy, you need to research 30 other technologies first. The whole project will require 4304 bulbs to complete. This number may vary depending on what other players research.

Only those who know Code of Laws and Polytheism can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows government form Thalassocracy.
Allows to build Aak.
Allows to build Cog.
Allows to research:
    → Magnetism
        → Overseas Trade
            → Machinery
        → Physics
            → Atomic Theory
            → Electricity
            → Optics
            → Screw Propeller
Requires knowledges:
    → Direct Democracy
    → Trade
        → Glass Working
    → Literacy
    → Currency
        → First Republic

The Corporation

To research The Corporation, you need to research 90 other technologies first. The whole project will require 77483 bulbs to complete. This number may vary depending on what other players research.

Only those who know Egalitarianism, First Republic, Martial Games, Mathematics, Metallurgy, and Seafaring can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.

Halves the corruption of trade related to distance from the capital (or eliminates it for Federation governments).

Allows to build Riot Police.
Allows to research:
    → Communism
        → Espionage
            → Mobile Warfare
    → Logistics
        → Mass Production
            → Miniaturization
    → Mass Entertainment
        → Television
            → Computers
            → Radar
Requires knowledges:
    → Industrialization
    → Democracy
        → Federation
    → Chemical Synthesis
    → Steel
        → Refining

The Harness

To research The Harness, you need to research 10 other technologies first. The whole project will require 600 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Chariot.
Allows to build Cart.
Allows to research:
    → Construction
        → Bridge Building
            → Invention
            → Sanitation
        → Martial Games
            → Hastilude
        → Mathematics
            → Astrology
            → University
    → Saddle Stirrup
        → Chivalry
            → Bushido
            → Hastilude
        → Slave Trade
            → Desert Code
Requires knowledges:
    → Animal Husbandry
    → Leather Tanning
        → Horseback Riding
    → Carpentry
    → Pottery
        → The Wheel

The Republic

To research The Republic, you need to research 48 other technologies first. The whole project will require 12731 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming, First Republic, The Wheel, and Theology can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows government form Republic (with Palace).
Allows to research:
    → Industrialization
        → Electricity
            → Chemical Synthesis
            → Cinematography
            → Electromagnetism
            → Steel
        → Engineering
            → Optics
            → Radio
            → Steel
        → Federation
            → The Corporation
        → Labor Union
            → Concrete
            → Guerilla Warfare
        → Zaibatsu
Requires knowledges:
    → Trade
    → First Republic
        → Banking
    → Theology
    → Printing Press
        → Egalitarianism

The Wheel

To research The Wheel, you need to research 6 other technologies first. The whole project will require 324 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Watermill (with River but no Windmill).
Allows to build Windmill (absent Watermill).
Allows to research:
    → Buddhism
        → Confucianism
            → Martial Arts
        → Shinto
            → Shogunate
    → Simple Machines
        → Bridge Building
            → Invention
            → Sanitation
        → Mathematics
            → Astrology
            → University
    → The Harness
        → Construction
            → Bridge Building
            → Martial Games
            → Mathematics
        → Saddle Stirrup
            → Chivalry
            → Slave Trade
Requires knowledges:
    → Forestry
    → Creative Art
        → Carpentry
    → Forestry
        → Pottery

Theology

To research Theology, you need to research 32 other technologies first. The whole project will require 5336 bulbs to complete. This number may vary depending on what other players research.

Only those who know Code of Laws, Monotheism, Polytheism, and Writing can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.

Improves the effect of Churches.

Allows to build Cathedral (with Church and Culture 2900 but no Temple or Mosque).
Allows to build Ecclesiastical Palace (with Church, Cathedral, and Culture 3200 but no Angkor Wat, Forbidden City, Sultan Palace, Osaka Castle, or Palace).
Allows to build J.S. Bach's Cathedral (with Cathedral and Culture 4800 but no Temple, Mosque, Kaaba, Leshan Buddha Statue, Golden Temple, Temple of City God, or Kyoto Fushimi Inari).
Allows to research:
    → Egalitarianism
        → Democracy
            → Conscription
            → Federation
        → Socialism
            → Labor Union
        → The Republic
            → Industrialization
    → Fundamentalism
Requires knowledges:
    → Direct Democracy
    → Literacy
        → Philosophy
    → Monotheism
    → First Republic
        → Christianity

Theory of Gravity

To research Theory of Gravity, you need to research 43 other technologies first. The whole project will require 10907 bulbs to complete. This number may vary depending on what other players research.

Only those who know Polytheism and Writing can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Isaac Newton's College (with University and Culture 6700).
Allows to research:
    → Machinery
        → Socialism
            → Labor Union
        → Steam Engine
            → Railroad
            → Screw Propeller
    → Physics
        → Atomic Theory
            → Electromagnetism
            → Radioactivity
        → Electricity
            → Chemical Synthesis
            → Cinematography
            → Electromagnetism
            → Steel
        → Optics
            → Electronics
            → Theory of Relativity
        → Screw Propeller
            → Flight
            → Turbine
Requires knowledges:
    → Astrology
    → Glass Working
        → Astronomy
    → Mathematics
    → Medicine
        → University

Theory of Relativity

To research Theory of Relativity, you need to research 79 other technologies first. The whole project will require 65939 bulbs to complete. This number may vary depending on what other players research.

Only those who know Agricultural Farming, First Republic, Iron Working, Mathematics, Mysticism, Seafaring, The Wheel, and Theology can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to research:
    → Great Unification Theory
    → Nuclear Fission
        → Nuclear Power
            → Advanced Rocketry
            → Laser
    → Satellite System
        → Modern Warfare
Requires knowledges:
    → Engineering
    → Physics
        → Optics
    → Engineering
    → Electromagnetism
        → Radio

Trade

To research Trade, you need to research 17 other technologies first. The whole project will require 1377 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.

Halves the waste of production related to distance from the capital.

Allows to build Marco Polo's Embassy (with Culture 1900).
Allows to build Caravan.
Allows to research:
    → Banking
        → Economics
            → Democracy
        → The Republic
            → Industrialization
    → Glass Working
        → Astronomy
            → Navigation
            → Theory of Gravity
        → Craft Guilds
            → Alchemy
        → Medicine
            → Sanitation
            → University
        → Thalassocracy
            → Magnetism
    → Slave Trade
        → Desert Code
            → Islam
Requires knowledges:
    → Copper Working
    → Writing
        → Currency
    → Pastoralism
    → Sailing
        → Exploration

Turbine

To research Turbine, you need to research 77 other technologies first. The whole project will require 56291 bulbs to complete. This number may vary depending on what other players research.

Only those who know First Republic, Mathematics, Metallurgy, Seafaring, and Theology can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Hydro Plant (with Factory and River).
Allows to build Transport.
Allows to build Destroyer.
Allows to research:
    → Combustion
        → Automobile
            → Logistics
            → Welding Technology
        → Flight
            → Advanced Flight
    → Offshore Exploration
        → Amphibious Warfare
            → Combined Arms
        → Recycling
            → Environmentalism
            → Nuclear Power
Requires knowledges:
    → Engineering
    → Electricity
        → Steel
    → Steam Engine
    → Physics
        → Screw Propeller

University

To research University, you need to research 39 other technologies first. The whole project will require 7739 bulbs to complete. This number may vary depending on what other players research.

Only those who know Polytheism and Writing can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build University (with Library, City Hall, and Culture 3400).
Allows to build Warfare Museum (with City Hall and Culture 4000).
Allows to research:
    → Chemistry
        → Atomic Theory
            → Electromagnetism
            → Radioactivity
        → Biology
            → Refrigeration
        → Explosives
            → Conscription
            → Engineering
        → Steam Engine
            → Railroad
            → Screw Propeller
    → Economics
        → Democracy
            → Conscription
            → Federation
    → Metallurgy
        → Explosives
            → Conscription
            → Engineering
        → General Staff
            → Tactics
        → Railroad
            → Industrialization
    → Theory of Gravity
        → Machinery
            → Socialism
            → Steam Engine
        → Physics
            → Atomic Theory
            → Electricity
            → Optics
            → Screw Propeller
Requires knowledges:
    → Construction
    → Simple Machines
        → Mathematics
    → Philosophy
    → Glass Working
        → Medicine

Vedism

To research Vedism, you need to research 12 other technologies first. The whole project will require 870 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Monk Monastery (with Temple and Culture 1800 but no Church or Mosque).
Allows to research:
    → Buddhism
        → Confucianism
            → Martial Arts
        → Shinto
            → Shogunate
    → Hinduism
        → Jainism
    → Monotheism
        → Christianity
            → Theology
        → Islam
            → Fundamentalism
            → Shiism
Requires knowledges:
    → Agricultural Farming
    → Ceremonial Burial
        → Polytheism
    → Alphabet
    → Pottery
        → Writing

Warrior Code

To research Warrior Code, you need to research 4 other technologies first. The whole project will require 132 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Warriors.
Allows to research:
    → Copper Working
        → Bronze Working
            → Iron Working
        → Currency
            → First Republic
            → Trade
        → Masonry
            → Drama
            → Iron Working
        → Saddle Stirrup
            → Chivalry
            → Slave Trade
Requires knowledges:
        → Creative Art
    → Fire Making
    → Stone Knapping
        → Leather Tanning

Welding Technology

To research Welding Technology, you need to research 96 other technologies first. The whole project will require 97019 bulbs to complete. This number may vary depending on what other players research.

Only those who know Egalitarianism, Martial Games, and Steel can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Armor.
Allows to build Anti-aircraft Turret Gun.
Allows to research:
    → Mass Production
        → Miniaturization
            → Computers
            → Plastics
            → Quantum Theory
            → Rocketry
    → Mobile Warfare
        → Amphibious Warfare
            → Combined Arms
        → Jet Propulsion
            → Rocketry
        → Robotics
            → Nanotechnology
Requires knowledges:
    → Combustion
    → Machine Tools
        → Automobile
    → Electricity
    → Atomic Theory
        → Electromagnetism

Writing

To research Writing, you need to research 6 other technologies first. The whole project will require 276 bulbs to complete. This number may vary depending on what other players research.

To preserve this technology for our nation some bulbs are needed each turn.
Allows to build Library (with Culture 100).
Allows to research:
    → Currency
        → First Republic
            → Banking
            → Christianity
            → Invention
            → Thalassocracy
        → Trade
            → Banking
            → Glass Working
            → Slave Trade
    → Drama
        → Martial Games
            → Hastilude
    → Literacy
        → First Republic
            → Banking
            → Christianity
            → Invention
            → Thalassocracy
        → Paper Making
            → Printing Press
            → Taoism
        → Philosophy
            → Medicine
            → Shiism
            → Taoism
            → Theology
    → Vedism
        → Buddhism
            → Confucianism
            → Shinto
        → Hinduism
            → Jainism
        → Monotheism
            → Christianity
            → Islam
Requires knowledges:
    → Creative Art
    → Stone Knapping
        → Alphabet
    → Forestry
        → Pottery

Zaibatsu

To research Zaibatsu, you need to research 80 other technologies first. The whole project will require 46955 bulbs to complete. This number may vary depending on what other players research.

Only those who know First Republic, Iron Working, Martial Arts, Mysticism, Seafaring, Shogunate, The Wheel, and Theology can acquire this technology (by any means).
To preserve this technology for our nation some bulbs are needed each turn.

TIP: Increase factory production by 25% (this effect is cancelled by Labor Union).

Requires knowledges:
    → Martial Arts
    → Chivalry
        → Bushido
    → Railroad
    → The Republic
        → Industrialization