From New Scientist:
War, what is it good for? A lot, it could turn out.
Lethal warfare drove the evolution of altruistic behaviour among ancient humans, claims a new study based on archaeological records and mathematical simulations.
If correct, the new model solves a long-standing puzzle in human evolution: how did our species transition from creatures interested in little more than passing down their own genes to societies of (generally) law-abiding (mostly) monogamists?
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My Comment: I am a sucker for stories like this one. It makes you wonder on where did we come from .... and how did we evolve to where we are today.