Advanced Flight
Alphabet
Amphibious War
Astronomy
Atomic Theory
Banking
Bronze Working
Ceremonial Burial
Chemistry
Chivalry
Code of Laws
Combustion
Communism
Computers
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The Corporation
Currency
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Ecology
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Education
Electricity
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Engineering
Espionage
Fascism
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Fission
Flight
Free Artistry
Genetics
Gunpowder
Horseback Riding
Industrialization
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Invention
Iron Working
Ironclads
The Laser
Literature
Magnetism
Map Making
Masonry
Mass Production
Mathematics
Medicine
Metallurgy
Military Tradition
Miniaturization
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Monotheism
Motorized Transportation
Music Theory
Mysticism
Nationalism
Navigation
Nuclear Power
Philosophy
Physics
Polytheism
Pottery
Printing Press
Recycling
Refining
Replaceable Parts
The Republic
Robotics
Rocketry
Sanitation
Satellites
Scientific Method
Smart Weapons
Space Flight
Stealth
Steam Power
Steel
Superconductor
Synthetic Fibers
Theology
Theory of Gravity
Warrior Code
The Wheel
Writing