[Regarding the slave revolt random event.] Does anyone know if this goes away if you change civics away from Slavery? I would assume it does, but if it is actually implemented that way in the game is a different manner.
For Spiritual leaders that could make a far less disrupting event, and even for non-Spiritual leaders with an early small empire, the cost of throwing all your additional cities into anarchy might not be as bad as the damage that is done to your capital.