African American boys oftentimes fall behind in school early, start feeling discouraged, check out, drop out, end up on the streets and then get into trouble.

Ultimately, if you think about all the youth that everybody has mentioned here in Africa, if everybody is raising living standards to the point where everybody has got a car and everybody has got air conditioning, and everybody has got a big house, well, the planet will boil over - unless we find new ways of producing energy.

I can be much more sarcastic and, I think, sometimes withering in my assessments of things than I allow to show in my public life.

When you see a Donald Trump and a Bernie Sanders, very unconventional candidates, have considerable success, then obviously there's something there that's being tapped into; a suspicion on globalization, a desire to reign in it's excesses, a suspicion of elites and governing institutions that people feel may not be responsive to their immediate needs. And that sometimes gets wrapped up in issues of ethnic identify or religious identity or cultural identity, and that can be a volatile mix.

The arts are what makes life worth living. You've got food, you've got shelter, yeah. But the things that make you laugh, make you cry, make you connect - make you love are communicated through the arts. They aren't extras.

As you travel through the Middle East what keeps on striking home to me is how similar everyone is, and yet the degree to which we can find differences to fight wars over. It requires a great deal of empathy, I think, between various sides to overcome this history and live in peace.

I'm suspicious of too much certainty in the pursuit of understanding just because I think people are limited in their understanding.