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“Most of the calories that men in these societies provision come from hunting or fishing. So in many hunter-gatherer groups it's not unusual for men to contribute up to 90 percent or more of the protein eaten by their families and band. These valuable nutrients and fat, however, come from vertebrate meat. And hunting requires many years of investment to master; even then, return rates are often low and quite variable. among contemporary foraging groups, vertebrate meat can range from anywhere between 30 percent and 80 percent of the diet. So women's work is extremely important since women extract more constant and predictable food resources, including roots, nuts, seeds, invertebrate meat, and plant fibers that require a large amount of effort to process. Therefore, both sexes depend very much on one another to divide their labor between the staples needed to survive and the high-value nutrients required to thrive.”

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Book:Our Political Nature: The Evolutionary Origins of What Divides Us
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“What accounts for this great diversity running through our veins? The struggle for survival entails not only the competition for resources and mates but also the battle against pathogens. In this immunological arms race, the blood group antigens of human populations have coevolved with a microscopic world of enemies (as well as allies and neutral parties). Natural selection shapes the human immune system by favoring the configurations best adapted to a population's environment.”

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Book:Our Political Nature: The Evolutionary Origins of What Divides Us
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“...politics isn't -just about money-, but also about who gains authority over a population's minds and bodies. Controlling education, healthcare, economic policies, and morally controversial laws can influence how people recombine and transmit DNA in various ways, at different rates, and to what consequence. The rise of power of political extremists greatly magnifies this control over both genetic and economic resources.”

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Book:Our Political Nature: The Evolutionary Origins of What Divides Us
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