I'm a child of the Cold War. You do not say, "Oh, my God, there are Russian planes, so I'm going to cede the field." I mean, what kind of world would we have had if the United States had done that for 60 years?

Our approach [to global security] has changed by the way we've elevated development. The biggest lesson is to recognize global responsibility.

When I used to teach civil procedure as a law professor, I would begin the year by telling my students that “civil procedure is the etiquette of ritualized battle.” The phrase, which did not originate with me, captured the point that peaceful, developed societies resolve disputes by law rather than by force.

I think an awful lot of the reasons people put forward for not liking Hillary Clinton play into deep-seated, negative female stereotypes: ambition, secrecy, calculating. I mean, that is Lady Macbeth, a kind of cold woman. I don't think that's Hillary. And I don't think people would judge a man in the same way.

In Sarajevo and in Syria, these are societies - in Bosnia, in Serbia, in Kosovo, in Syria - where ethnicities live side by side and intermarry for long periods of time until it becomes valuable to exploit the division. And yes, the division's there because you can always revert back to history, you can always inflame it, but it is manipulated for political ends.

When we talk about gender pay gaps in the United States, and if you look at women without children, they earn 96 cents for every dollar that a man is earning, while for mothers it is about 76 cents. That's nearly 25 percent less. For single mothers, the situation is even worse. One third of them are living in poverty or just on the edge of poverty. This is an unacceptable situation.

Motherhood is a greater predictor of wage inequality than gender is. It's enormous.