This clearly isn't sinking in. Women (nearly) all successfully reproduced. Men were frequently weeded out. The men who were weeded out were less cooperative. The winners mated with the women of both groups. This is why your ancestors are 66% female 33% male.
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Replying to @CovfefeAnon @vanbuteng and
This pressure was especially intense in Europe where waves of steppe nomads wiped out men and took women as wives over and over. The end result is that Euro men conquered the world because they were the end result of selection for the traits needed to conquer (cooperation).
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No, it doesn't because women weren't under selective pressure for it. Men fail to cooperate -> death at the hands of other men Women fail to cooperate -> still leaves descendants The most basic of all evolutionary facts - you get what you select for.
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Think that through - do peahens inherit their fathers plumage? Are men under selective pressure for wide hips? Same genes, different morphology in males and females. Same for behaviors.
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Hips are a sex specific selective pressure on women. Women who have hips too narrow to give birth don't leave offspring. Cooperation, ability to get along with men in a war band is a selective pressure on men. Men who fail in that area die without offspring.
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