Ancient Era Techs
Pottery
Animal Husbandry
Archery
Mining
Sailing
Calendar - Needed to see Cotton
Writing - Unlocks research pacts
Trapping - Can Construct Camps, Trading Post
The Wheel
Masonry - Allows construction of Walls
Bronze Working
Classical Era Techs
Optics
Philosophy
Horseback Riding
Mathematics
Construction
Iron Working
Medieval Era Techs
Theology
Civil Service
Currency
Engineering
Metal Casting
Compass
Education
Chilvalry
Machinery
Physics
Steel
Other Techs
Astronomy
Banking
Printing Press
Gun Powder
Acoustics
