Something else people fail to realize, is a forceful UN will lead to more war, not less. UN as a place to talk is OK, UN as a forcefull entity - will lead only to the reproduction on a larger scale of the chaos you get when splintered national governments have multiple armed factions who cannot agree.

We see it rather often, where a large cultural minority will get legislativly shafted by the cultural majority, and the minority cries "tyranny" and the majority yells back to "respect democratic process" and they end up slaughtering each other.