"A 'kick me' on his backside"
It's a savage place, inhabited by human critters who have some real dark stuff in their makeup. "Original sin," Christian theology calls it; some might prefer simply thinking of it as the dark side of human nature. But if there's anything history teaches us, it's that it's a significant factor in human affairs, and that civilized people and nations spend a lot of time fighting it.
A bright new world in which enlightened people universally make nice-nice with each other is unlikely, to say the least, this side of the Eschaton.