No mention of it in the game documentation that I can find. When do you get anarchy? How exactly does it work? Any additional thoughts on when it is worthwhile or just always avoid it? I have played a few games and never had anarchy and suddenly I have a game with anarchy.
11 Answer
Anarchy is triggered when you switch to a government type your civilization has previously had.
It lasts a small number of turns, and during anarchy, no yields are accrued (though you can still command units normally).