Men don't really compete due to a conscious desire to reproduce, though. It simply pleases men to have more power and more access to more women. The only reason

Men don't really compete due to a conscious desire to reproduce, though. It simply pleases men to have more power and more access to more women. The only reason is because they are descended from men who had power and access to women. This seems to be a common misunderstanding of how natural selection works. Giraffes don't select other giraffes consciously because of their ability to reach higher leaves. They select them unconsciously simply because they are attracted to giraffes with longer necks. And they are attracted to giraffes with longer necks because they are descended from giraffes who were attracted to giraffes with longer necks and those giraffes were able to reach higher leaves and could slightly out-compete the other giraffes.