All right well let's see here, I think I've played enough games. Whenever you're struggling to catch up in tech, or beelining stuff for war, it helps to ingrain the tree in your memory. So sort of grouped by era... (though not precisely)
Fishing, Hunting, The Wheel, Agriculture, Mysticism, Mining, Sailing, Animal Husbandry, Pottery, Archery, Bronze Working, Masonry, Polytheism, Meditation, Writing, Priesthood, Monotheism.
Alphabet, Mathematics, Aesthetics, Currency, Code of Laws, Calendar, Construction, Iron Working, Horseback Riding, Compass, Literature, Drama, Monarchy, Metal Casting.
Philosophy, Music, Theology, Feudalism, Machinery, Civil Service, Engineering, Guilds, Optics, Paper, Banking, Divine Right... is that all medieval has?
Education, Nationalism, Astronomy, Liberalism, Printing Press, Economics, Constitution, Military Tradition, Gunpowder, Chemistry, Military Science, Replaceable Parts.
This is where it gets tricky... Uhh... Democracy, Steel, Rifling, Corporation, Steam Power, Railroad, Scientific Method, Physics, Biology, Communism, Assembly Line, Fascism, Medicine, Artillery, Combustion, Electricity, Industrialism.
Flight, Plastics, Rocketry, Refridgeration, Fission, Radio, Mass Media, Satellites, Superconductors, Advanced Flight, Computers, Robotics, Composites, Ecology, Laser, Fiber Optics.
Stealth, Genetics, Fusion, Future Tech.
All right, so someone tell me what I missed so I can slap myself in the face.