As it pertains to statecraft, what is the point of bringing up "insurrections"? It just seems like a pedantic red herring to avoid discussing war. Insurrections are either aborted attempts to start wars and brutally suppressed, or they become protracted wars, which folds into the empire cost benefit analysis I pointed to. When it comes to wars, I think that territory, violence, the threat of it, and its costs are the attendant free variables in which decisions are made.