As more and more researchers are pointing out flaws in the views of gender originally presented by evolutionary psychology, it's annoying to note that the revisionism is mostly coming from women. This is supposed to be science, tested with actual data. Significantly, a lot depends on where you stand, and sex roles appear more inevitable to the male evolutionary psychologists who first propounded their genetic immutability. The other big trend in evolutionary psychology, which also comes from studying non-human primates, is about peacemaking and cooperation. Aggression, while real, isn't the entire story.
Nature is red in tooth and claw, but it turns out there are also plenty of hugs to go around.
Much had been written about violence and aggression of all kinds, but very little about how social animals go about the vital task of getting along. They didn't even like the words. He tells of an experiment with rhesus monkeys and stump-tailed monkeys, species with different calls, gestures and styles. Stump-tails are more peaceable than rhesus, less obsessed with hierarchy and who sits where, and, having apparently read de Waal, they are very into reconciliation. After fights they reconcile three times as often as rhesus, and they have a big repertoire of reassuring gestures.