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.

Many species reciprocate, but only humans gossip, and much of what we gossip about is the vale of other people as partners for reciprocal relationships.

The final moment of success is often no more thrilling than taking off a heavy backpack at the end of a long hike. If you went on the hike only to feel that pleasure, you are a fool. Yet people sometimes do just this. They work hard at a task and expect some special euphoria at the end. But when they achieve success and find only moderate and short-lived pleasure, they ask is that all there is? They devalue their accomplishments as a striving after wind. We can call this the progress principle: Pleasure comes more from making progress toward goals than from achieving them.

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.

Reciprocity is a deep instinct; it is the basic currency of social life.

The most powerful force ever known on this planet is human cooperation - a force for construction and destruction.

While it is useful to rebut charges and get your arguments out in circulation, you have to understand that arguments and evidence have little impact on people as long as their feelings tilt them against you.