I'm playing a Bulgaria campaign in RFCE++ currently, and I have seen all of the civilizations east of me collapse. It's 1206 AD currently, and other than France holding a couple cities around Jerusalem, there is everything from Tunis and Turkey east up for grabs. The problem, though, is that all the provinces are unstable. In fact, some of the provinces I control (Morea up through Moldova) are unstable. I have a good stability rating right now since I have a manor house, courthouse, and castle in all of my cities, but wouldn't expanding into that territory tank my stability? What do you do to get provinces to become stable again? Ones that I've held for 400 years are still unstable. I guess I'm assuming that that is what causes a negative expansion stability value, and that's really the biggest problem for my stability rating.