[N]o moral conclusions of any kind can be drawn from evolution. The asymmetry in prenatal sexual investment between the genders is a fact of life, not a moral outrage. It is “natural.” It is terribly tempting, as human beings, to embrace such an evolutionary scenario because it “justifies” a prejudice in favor of male philandering, or to reject it because it “undermines” the pressure for sexual equality. But it does neither. It says absolutely nothing about what is right and wrong. I am trying to describe the nature of humans, not prescribe their morality. That something is natural does not make it right. […] Evolution does not lead to Utopia. It leads to a land in which what is best for one man may be the worst for another man, or what is the best for a woman may be the worst for a man. One or the other will be condemned to an “unnatural” fate.
Matt Ridley, The Red Queen: Sex and the Evolution of Human Nature, New York, 1993, pp. 180-181