Guys im having the same problem
C3C. Problem is i have so many cities. I got 3 civs to attack 1 strong one, waited for the stockpile of AI troops to wear down then went in with knights.
War is going well, knight armies in the field kicking butt etc. Plenty of leaders with Heroic epic.
But now i have around 50 cities!! .
As ive taken more cities is this increasing the corrption in my core cities as i suspect?.
Can anyone confirm that lots of courthouses in the empire, not just corrupt cities will help?.
I COULD make peace and go for space race/democracy. Never really bothered with democracy before (1 change a game only) how much does that help??