Democrats talk about programs like Social Security or Medicare, but it's not clear to most voters what Democrats' core moral values are.

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.

I think that we Americans, in particular, tend to think too directly about problems. If there's a problem we want to basically go in with a screwdriver or else drop bombs on it. A better way to solve problems is to think indirectly and try to change the environment. So I think you can gain much better self-control not so much by working on yourself as by looking at the situations you're in and the people you hang around, and changing your environment.

When you hear someone criticize a policy on the other side, thats fine. But when you start hearing motive-mongering and demonization, stand up to it just as you would if it were something that was racist or sexist. If we avoid the demonization, disagreements can be positive.

I think the greatest truths, the ones that you find in every culture that has any sort of history of reflection of writing, the greatest truth is that there's nothing good or bad, but thinking makes it so. That's the way Shakespeare put it. But you get basically the same idea from Buddha, from the Bhagavad Gita in India, and from the Stoics in ancient Greece and Rome.

Understanding the simple fact that morality differs around the world, and even within societies, is the first step toward understanding your righteous mind.

Most of our social nature is like that of other primates - we're mostly out for ourselves.