If you check out the creation forum, things like this are address on a regular basis... as for how to you just have to edit the govern.txt in ...\ctp2_data\default\gamedata. For example, anarchy has the following line...
quote:
TooManyCitiesThreshold=1000
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By changing the values you can make this a none factor. Raising all governments to 1000 should fix your problem, but make the game a little unrealistic... just like anarchy is... who ever heard of a peaceful transition from one gov't to another, the threshold should be low for that one at least causing riots... people hate major changes like that... and a civil war isn't always a bad thing is it
Hope that solves your question.
Omni