Some questions I have no answer for:
Are humans still evolving? Are we changing with high population density, competition for resources and the presence of warlike others? What is the ratio of importance for people living in a very different environments?
It is so easy to get young men to March off to war. At seventeen I enlisted in the Marine Corps because there was a war going on and I didn’t want to miss it. Yes, that was the culture of those times but it doesn’t take much to draw people in today. Look how many wars, declared and undeclared, started with a false flag. People suddenly were ready to fight.
We know this and ignore it.