Here's a really good explanation of what is going on in Afghanistan (video), it takes 17 minutes to watch.
It's probably a good explanation of what is going on anywhere in the world that we have war going on.
I'm reading a book called Constant Battles: Why We Fight by Steven Le Blanc, about humanity's violent past. Basically the author is saying that warfare has always been with us and was probably more prevalent in the distant past than it is today. Mortality due to warfare was routinely as much as 25% of all males among our distant ancestors.
The author suggests that we come by this warlike propensity "honestly", that our ape-ish forebears were probably doing the same with possibly even higher mortality rates. He also proposes that there is a link between big game hunting and warfare; apes that hunt (such as chimpanzees) are more likely to also attack and kill each other. Apes that do not hunt (such as gorillas and bonobo chimps) also do not attack and kill each other.
I haven't finished reading the book but Le Blanc appears to suggest that the good news is that we are actually getting better, we practice warfare far less and are far more horrified by the idea than we ever used to be.
If we don't kill each other all off---either by warfare or by environmental destruction---then we may actually humanize into something pretty decent.
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