Most civs settled 7-8 cities in my game so there is space to build empires, but around the renaissance era space ran out, that's when I expected civs like the Aztecs, Greeks, Iroquois and Carthagians to declare offensive wars and shake up the game a bit but no one is doing anything. The AI is not passive, they offer trades, there are a few friendly relations and they bribe each other but it feels passive, the game is basically stagnant at this point.
I might try throwing in more civs next time so they are hardpressed to go to war.