How can I set things up so that various factions of demons constantly fight each other, preventing a proper government from forming in Hell? I've already put three factors in:
1): New demon lords constantly arrive in Hell, having been damned from Earth.
2): By and large, demon lords are awful people.
3): Demons survive by drinking liquid emotion, and there's never enough of it in Hell to go around.
Still, this seems insufficient. Even with resource scarcity, it seems like a coalition would eventually form to distribute resources among established demons and kill any new demons who arrived. (The dead in Hell go somewhere else--nobody knows where.) Anyways, what else can I add to prevent any demon lord from surviving longer than a few centuries before someone kills him, and to prevent any government from lasting longer than six months before crumbling?
Edit: I should add that demon lords arrive in Hell with the ability to summon and bind lesser demons, and that the longer they live, the more they can bind at once. Two demon lords who can each bind twenty lesser demons have some motivation to team up to kill one who can bind thirty--after all, he could become quite a nuisance if he lives long enough to bind forty.