By Polly Cleveland, on August 19th, 2017% In The Evolution of Beauty, Yale ornithologist Richard Prum focuses on how female choice affects natural selection. Among the brightly-colored neotropical manakins, the females do all the work of raising chicks, while the males contribute only sperm. That gives the females the pick of the males. The males respond by dancing and singing on a common ground called a lek. Some males even dance in cooperative groups; the females mate with the alpha male of the group they pick. Prum says this cooperativeness happens because that’s what females prefer. Among the hunter-gatherer Hadza tribe in Tanzania, as reported by Nicholas Blurton-Jones in Demography and Evolutionary Ecology of Hadza Hunter-Gatherers (2016), the women produce 90% of the food. Hadza men and women are extremely cooperative and non-violent. Could this be due to female choice? . . . → Read More: Part II Beauty, Cooperation, and the Hadza Hunter-Gatherers
By Polly Cleveland, on August 8th, 2017% In 1860 Charles Darwin wrote to a colleague: “The sight of a feather in a peacock’s tail…makes me sick!” What was Darwin’s problem? He had just published On the Origin of Species, laying out his theory of evolution by natural selection. Yet he worried about seemingly maladaptive features of living organisms–like the peacock’s beautiful but cumbersome tail. In a later book, Darwin would argue that sexual selection also plays a major role in evolution. Yet to this day, as Richard Prum complains in his magnificent new book, The Evolution of Beauty, evolutionary biologists dismiss the possibility of anything besides natural selection. Likewise, mainstream economists dismiss the possibility that anything besides competition for profits could account for the economic world around us… . . . → Read More: Beauty and Profit: The Evolution of Beauty (2017) by Richard O. Prum
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