There are an awful lot of things going on that need understanding and explanation, but - to put it mildly - the world is a mess.

But I do not believe that the world would be entirely different if there were more women leaders. Maybe if everybody in leadership was a woman, you might not get into the conflicts in the first place. But if you watch the women who have made it to the top, they haven't exactly been non-aggressive - including me.

I don't actually believe in a clash of civilizations. I believe in a clash of the civilized and the noncivilized.

I think that there is never an indispensable leader, you know? I think that there is a time with dignity that one needs to leave.

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.

I think I've revived the costume-jewelry industry.

The greatest thrill in my life was to represent the United States of America.