Beyond the common pressure of starvation, men are under selective pressure to cooperate so as to not get wiped out by neighboring bands.
"Let's you and him fight" Obviously the invaders are a problem but they're an opportunistic infection.pic.twitter.com/1JKhLH0Ue8
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You're in denial of reality. Reality is that women who aren't mothers are always and everywhere are pretty happy to see a successful invasion - it means they're not going to die childless.
End of conversation
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