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They think that much of evolutionary psychology has been conducted with a bias regarding human sexuality.The authors argue that the public and many researchers are guilty of the "Flintstonization" of hunter-gatherer society; that is to say projecting modern assumptions and beliefs onto earlier societies.Ryan argues that although Ellsworth makes some valid points, he misunderstood his and Jethá's central argument.According to Ryan, they did not argue that human sexuality was the same as bonobo sexuality; but rather that coitus was more frequent than is generally acknowledged, and that a typical human being would have had multiple partners within relatively short periods of time (i.e. He argues that the main point of the book is to discredit "the standard narrative." He thinks reviewers read too much into the book, which merely seeks to challenge monogamy, rather than categorically reject it in favor of an alternative relationship model.He will be sensitive to signs of her sexual infidelities (which would reduce his all-important paternity certainty)—while taking advantage of short-term sexual opportunities with other women (as his sperm are easily produced and plentiful)." They clarify: "we don’t see [the elements of the narrative] as elements of human nature so much as adaptations to social conditions—many of which were introduced with the advent of agriculture no more than ten thousand years ago." The authors take a broad position that goes beyond sexual behavior, arguing that humans are generally more egalitarian and selfless than is often thought.In an interview Ryan said, "we’re not saying that sharing was so widespread because everyone was loving and sitting around the fire singing “Kumbaya” every night.
[even though evolution] is very much about reproduction—variation in reproductive success is evolution" and endorses Saxon's characterization of the book as an "intellectually myopic, ideologically driven, pseudo-scientific fraud." Some reviews particularly praise the book for confronting some of the established theories of evolutionary psychology. King wrote, "lapses do mar more than one passage in the book.The book generated a great deal of publicity in the popular press, where it was met with generally positive reviews.A number of scholars from related academic disciplines such as anthropology, evolutionary psychology, primatology, biology, and sexology have commented on the book; most have been critical of the book's methodology and some of its conclusions, although some academics have praised the book.Thus they think that there has been a bias to assuming that our species is primarily monogamous despite what they argue to be evidence to the contrary.They argue for example, that our sexual dimorphism, testicle size, female copulatory vocalization, appetite for sexual novelty, various cultural practices, and hidden female ovulation, among other factors strongly suggest a non-monogamous, non-polygynous history.
According to the authors, before agriculture, sex was relatively promiscuous, and paternity was not a concern, in a similar way to the mating system of Bonobos.