I don’t think we’re an animal that was built to be happy; we are an animal that was built to reproduce.

Both sexes like the exercise and challenge of sports, but for men it's also a basic display behavior for impressing and winning a mate.

We spend our lives trying to get along with people so we can keep our jobs, keep our marriages together, so that we can raise our kids properly.

Along with our many human propensities, we evolved a huge cerebral cortex with which we make decisions.

We all have restlessness in long-term relationships.

There are cognitive processes and limbic reactions associated with basic emotions. And you can change brain chemistry, but you're still not going to change memories and experiences in a human being.

Globalization requires taking a broad contextual and long-term view.