What set us apart from most or all of the other hominid species was our ultrasociality, our ability to be highly cooperative, even with strangers, people who are not at all related to us.

I began graduate school in the late 1980s, and my goal was to understand how morality varied across cultures and nations. I did some research comparing moral judgment in India and the U.S.A.

Human rationality depends critically on sophisticated emotionality. It is only because our emotional brain works so well that our reasoning can work at all.

The extreme self-sacrifice characteristic of group-selected species such as ants and bees can often be found among soldiers.

Economic issues are just as much moral issues as social issues.

To understand most important ideas in psychology, you need to understand how the mind is divided into parts that sometimes conflict. We assume that there is one person in each body, but in some ways we are each more like a committee whose members have been thrown together to do a job, but who often find themselves working at cross purposes.

The human mind is a story processor, not a logic processor.