Morality, after all, has nothing to do with selflessness. On the contrary, self-interest is precisely the basis of the categorical imperative.

Humans have a lot of pro-social tendencies.

Armies are a purely human invention. Most soldiers who go to war nowadays don't even do it because they're inherently aggressive.

You should know as much as you can about the human species if you have a hand in designing human society. Of course, I'm not saying that you can derive moral rules from nature - that's deriving an ought from an is, as the philosophers say - but you do need to know what kind of animals we are if you want to design a stable society.

Male bonobos really don't fit the human male ideal.

If you ask anyone, what is morality based on? These are the two factors that always come out: One is reciprocity, … a sense of fairness, and the other one is empathy and compassion.

When it comes to social interaction, the chimpanzees appear to be just as intelligent as we are.