Reading tip for you: Prometheus Rising by Robert Anton Wilson. Especially the part about the first 4 primitive circuits of the mind which govern survival, dominance, sex, stuff like that. War is very centered on Circuit II: dominance, emotions and territorial thinking.

http://www.wikisummaries.org/Prometheus_Rising

It fucked my mind when I read it :) It's a bit far out sometimes though, but it's a cool read.