What triggers the change to the next age?

steeemer

Chieftain
Joined
Oct 31, 2008
Messages
43
I always thought that the Civs all changed at the same time to the next age (medievil, etc.) but after looking at the forums today I am not sure.

Does everyone change ages at the same time or does something trigger it for each age?

Thanks
 
Each civ changes separately, whenever they get the right number of techs:
5 techs for medival
14 techs for industrial
25 techs for modern
 
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