Foreign policy is now a huge field. It isn't just people who are studying political science. There are so many aspects to it in terms of understanding hard science for people who are studying climate change, or people who are interested in health policy or food security, or people who care about education.

To be safe at the expense of the liberty of other people is a difficult equation.

Life is grim, and we don't have to be grim all the time.

One of the issues I kept saying to my students is you have to learn to interrupt. When you raise your hand at a meeting, by the time they get to you, the point is not germane. So the bottom line is active listening. If you are going to interrupt, you look for opportunities. You have to know what you're talking about.

When combined with information and communication technologies, microcredit can unleash new opportunities for the world's poorest entrepreneurs and thereby revitalize the village economies they serve.

Even though there were three newspapers in Chicago at the time, he said 'you wouldn't want to compete with your husband," and so instead of doing what I might do now in that situation, I basically saluted and found other things to do.

I have always seen the United States as a force of good. And I have learned that there is the idealistic part about what we can do at the U.N. and there is a doable part. And I have learned what is more doable.