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Sex at Dawn: The Prehistoric Origins of Modern Sexuality

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Sex at Dawn: The Prehistoric Origins of Modern Sexuality by Christopher Ryan

In opposition to what the authors see as the "standard narrative" of human sexual evolution, they contend that having multiple sexual partners was common and accepted in the environment of evolutionary adaptedness. The authors contend that mobile, self-contained groups of hunter gatherers were the norm for humans before agriculture led to high population density. Before agriculture, according to the authors, sex was relatively promiscuous and paternity was not a concern. This dynamic is similar to the mating system of Bonobos. According to the book, sexual interactions strengthened the bond of trust in the groups.
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