It's really pretty simple.
Subtract morality and subtract all your empty rhetoric:
Those which survive promote their genes. Those going to war have a lower chance of surviving. Those who can think of clever ways not to go to war, promote their genes (and their clever way of thinking).
Anyhow, I thought the 60s and 70s hippies were the ones who promoted the idea that you had to tear everything down to rebuild something worth keeping. And I thought it was your sort that pointed out the insanity of their position. You guys gonna flip on us again?