It's deeply human to do both the worst things and the best things because of your fear of loss.

So, you could often say things are terrible and that accounts for what happened, or things are really bright, and that accounts for what happened. Often, the real explanation for what happened is much more subtle and interesting and involves maybe small shocks or what a couple people did on a Wednesday morning that changed the arc of history.

As a matter of history, the Fourteenth Amendment was not understood to ban segregation on the basis of race.

There are bursts of things like Abraham Lincoln or Ronald Reagan or Franklin Delano Roosevelt or same-sex marriage that change very much what we thought we were all about.

I would reject the distinction between a Keynesian moment and a behavioral moment.

My role in the government was not to think about narratives and consistency with narratives, but think of the human consequences of rules.

Groups become more extreme and entrenched in their beliefs and polarized from others when members only exchange information that reinforces their views and filter out all else or never learn of alternatives. Thus they narrow their options, and magnify each other's prejudices and misconceptions. This trend leads to blind spots in decision making and to extreme behavior, even terrorism.