Vampires
Malakai, yours was a disorganized, disagreeable state of affairs that only fell due to in-fighting and distrust amongst the ones in power. I can assure you that if anything were to happen that would cause bitter tension between the higher ups in an organized society like the one I'm proposing, it would be settled between the parties involved, and not become a war like your world had.
In any case, I doubt there's many of us who would allow the shit to hit the fan quite so hard as in your world.