amrod
Warlord
Civs cannot trade techs before their "historical discovery date", this is to slow down tech progress.
All right, thanks. Another info I didn't know (like the numbers in the stability screen).
I know writing the manual is always the last thing to do, but it might help a bit with new players to include such things... please. I can't write the manual even though I'd like to help, as I don't know these things... at least until I find and ask them one by one.