Cass Sunstein

Every human being has an assortment of diverse identities, and it greatly matters which one is triggered by social situations, which hold up different kinds of mirrors. The same is true for nations.

Antonin Scalia was witty, warm, funny, and full of life. He was not only one of the most important justices in the nation's history; he was also among the greatest.

Individual investors beware: If you're constantly worried about a crash, you're probably making some big mistakes - and losing a lot of money in the process.

Liberals are sometimes defined as people who can't take their own side in an argument.

I think it's a very firm part of human nature that if you surround yourself with like-minded people, you'll end up thinking more extreme versions of what you thought before.

Research shows that if people are talking and listening to like-minded others, they become more dogmatic, more unified, and more extreme. Personalized Facebook experiences are a breeding ground for misunderstanding and miscommunication across political lines and, ultimately, for extremism.