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The Moral Animal: Why We Are, the Way We Are: The New Science of Evolutionary Psychology
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Robert Sapolsky: The Biology of Humans at Our Best and Worst
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If we compare gibbons, which are monogamous, with baboons, which are not, we see that baboons have marked sexual size dimorphism and enlarged canines. Polygyny—which is associated with strategies two and three from the previous chapter—leads inexorably both to male-male violence and to the morphology that enables that violence.
Heather Heying • A Hunter-Gatherer's Guide to the 21st Century: Evolution and the Challenges of Modern Life

