As in a Russian doll, however, the outer layers always contain an inner core. Instead of evolution having replaced simpler forms of empathy with more advanced ones, the latter are merely elaborations on the former and remain dependent on them. This also means that empathy comes naturally to us. It is not something we only learn later in life, or that is culturally constructed.

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

If you look at national economies today, for example, the American economy, the European economy, the Indians, the Chinese, we're all tied together. If one of them sinks, the rest are going to sink with them and if one floats, the rest are lifted up. I find that very interesting.

Female bonobos form a strong sisterhood. They rule through female solidarity.

If both parties have a stake in the other, the chances of them killing each other are going to be reduced.

We justify the inequalities by saying some people are just better and smarter than others and the strong should survive and the poor can die off.

The primate laugh is given in playful contexts, and as such has a strong similarity to the human laugh.