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Is man a monogamous kind?
First, they have reduced the size of the canines. Secondly, upright walking develops. And thirdly, most likely, at the same time such a unique feature of a person begins to take shape, like hidden ovulation. If we assume that all these things have developed in a complex, then the following (simplified) picture emerges.
Ardipitek females actively use the opportunity to take food from males in exchange for sex. The more food, the more young you can grow. In this regard, those who can have sex regardless of the stage of the cycle receive an evolutionary advantage — a feature that is completely uncharacteristic of any mammals other than humans. At the same time, it is also profitable for the male to bring a lot of food - he will increase his reproductive success, conceiving more children. This contributes to the development of upright walking - simply because it is much more comfortable to carry a pile of food over a long distance in hands than in teeth. On the other hand, if the female can now give birth to babies more often, then it is also convenient for her to free her arms in order to handle several babies at once.
At some point, it is likely that those males and females who tend not only to enter into commodity-money relations with just anyone get an evolutionary advantage, but form stable pairs. The female will eventually grow more offspring, if she will have one, but a permanent getter. The male will spend his resources on the extraction of food just for the female that raises his children. But in order for such a relationship to be stable, it is necessary to finally get rid of the external signs of ovulation.
Practically in all animals, the female actively demonstrates to the surrounding males her readiness for conception - arches her back, bends, her labia swell and moisten, her smell changes; chimpanzees and bonobos use special genital skin to attract males. “Huge and pink as a traffic light, it signals the female's ability to conceive so that it can be seen per kilometer,” biologist Alexander Markov, who read a book in manuscript, comments on this paragraph.
Ancestors of man it all becomes terribly unprofitable. How does the female beg for food from the male if he sees that conception is now impossible? How can a male be sure that his children, if the whole herd runs around the female during ovulation? And it turns out that the most caring husbands are now obtained from those males who do not know how to determine ovulation, and the most faithful wives - from those females that maximally hide their fertility (for example, keep the breast size more or less constant regardless of the phase of the cycle and age of youngsters). At the same time, the ability to mate is fixed at any time, regardless of the stage of maturation of the eggs, because the female now needs sex not only for conception, but also for feeding (and also it is necessary to strengthen the attachment between monogamous partners - at the same time, the psychoactive role of oxytocin and other hormones associated with sexual pleasure).
Now that ardipitecs have matured to the formation of stable pairs, males can devote far less to the forces of intraspecific competition: sharing females once is easier and more convenient than competing for them during each ovulation. On the other hand, females now prefer to marry the most caring males, which means giving birth to caring and non-aggressive sons from them. As a result of these factors, the size of canines begins to progressively decrease (monkeys use them to demonstrate intraspecific aggression) and the ability of males to act together, such as raids for food, increases. And from there there is a direct road to the development of speech, military operations and football.
One may say that man has created labor, or meat-eating, or selection for immaturity, or uranium ores in Africa, or near-water way of life — there are still many complementary hypotheses of varying degrees of science and validity. But I like the idea of Lovejoy most of all in her simplified retelling: “Man created sex”. And then another love has participated, of course, wherever without it.
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Is man a monogamous kind?
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