[quote=@Rin]
[@ArenaSnow]My main worry about that idea is that it's kind of constricting and doesn't leave much room for anything other than demons and grimdark. ^^;

Little busy with stuff at the moment, but I'll try and write up a more involved pitch in a bit.
[/quote]

Just the overall pretense to start with - doesn't really excuse resistance groups, other kingdoms (possibly), the like.