My democracy collapsed after 6 turns. When I came back, I saved th game, and made sure every city was happy, or at least not in chaos. With 120 cities, only had a few unhappy people, and only because to make more entertainers would cause starvation. maybe I should have let them starve, it collapes again on the next turn.
It also collapesed earlier, when I was Not the agressor....
Yes I was the agressor, but had every happiness generator, including US. And 7 luxuries, marketplaces and police stations. Not in every city, of couse, that costs too much to build in the 1-shield cities. And would drain my treasury.
I expected this, just wanted to test it.
Restarted and changed to Republic, and that stayed stable. Maybe I should have done Communism. Maybe I will take that saved game and still try it.
I was going for a culture win, but may not have time to doulble the China culture. I am in supreme position, and so am disbanding units as fast as I make them in major conquered cities, to built culture fast. Haveny tried this tactic before, as a push to build much culture as fast as I can... never had so many extra units before.