From a reproductive standpoint, anyway.

http://phys.org/news/2014-12-biological-war-violent-conflict-wives.html

Really, though, of fucking course societies that engage in high levels of conflict over resources that require high levels of manpower to work tend to have more children than societies who live in very advanced economies where work is requiring less and less people and there is no need to take casualties in order to acquire resources.

This should surprise no one no one.

Funny how human evolution used to favor the strong, but now it's the poor and the weak who are having so many children. If this goes on long enough, we'll eventually evolve into an apathetic, unintelligent society.

Very true and very scary