There's actually a lot of evidence in primates and other animals that they return favors.

Chimpanzees, typically, kiss and embrace after fights. They first make eye contact from a distance to see the mood of the others. Then they approach and kiss and embrace.

If we look straight and deep into a chimpanzee's eyes, an intelligent self-assured personality looks back at us. If they are animals, what must we be?

I'm personally a nonbeliever, so I'm struggling with if we really need religion.

Humanity is actually much more cooperative and empathic than [it's] given credit for.

I call the notion that we are nothing but killer apes the Beethoven fallacy. Beethoven was disorganized and messy, and yet his music is the epitome of order.

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.