In accounts of men in battle, there is an incredible adrenaline rush from group-versus-group conflict. The fervor and passion of partisans is clearly rewarding; and if it's rewarding, it involves dopamine; and if it involves dopamine, then it is potentially addictive.

Human thinking depends on metaphor. We understand new and complex things in relation to the things we already know... once you pick a metaphor it will guide your thinking.

Diversity is not a virtue. Diversity is a good only to the extent that it advances other virtues, justice or inclusiveness of others who have previously been excluded.

I think the greatest work in social psychology from the 1950s and '60s is enormously important. I wish every high school kid could take a course in social psychology. I think we're making enormous strides in understanding the brain. These aren't yet giving us great insights, but I feel like we're on the verge of it. In five or ten years this basically searching the brain is really going to change things.

Our moral sense really evolved to bind groups together into teams that can cooperate in order to compete with other teams.

I think sociologists are among the best at thinking about emergence, of thinking about the ways that the society is more than the sum of the individuals. And I've found that much of the wisest writing on human social nature comes from sociology and anthropology, not from my own field of social psychology.

Liberals tend to be much more concerned about business and corporations as the oppressors. They look to government as the solution. On the Right it's the opposite. They see business as good, as what generates wealth in society, and they see government as the oppressor, which makes it hard for especially small businesspeople.