It wasn't God who introduced us to morality; rather, it was the other way around. God was put into place to help us live the way we felt we ought to.

We would much rather blame nature for what we don't like in ourselves than credit it for what we do like.

Females avoid conflict. They are afraid of violence. The males, on the other hand, are less averse to strife. But once conflict breaks out, the males are much better at reconciling. In a study done in Finland, children who had quarreled were asked how much longer they intended to be angry at one another. The boys proudly said: "Oh, at least one or two days." The girls said "forever".

The chimpanzees could tear me apart in no time. They're many times stronger than we are.

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

Science is not inherently good.

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