Iraq has no history of ethnic conflict.

It would be a huge mistake to abandon democracy promotion. Peaceful political change has been enormously successful in the past years in Eastern European countries as well as in countries like South Korea, South Africa, Chile and Indonesia. However, if possible, the use of force is something to avoid except in cases where genocide is threatened, like Bosnia or Libya or with regimes that threaten our security, like the Taliban and Saddam Hussein.

One of the things that ultimately led me to leave mathematics and go into political science was thinking I could prevent nuclear war.

NATO is still the most remarkable alliance in history. It stuck together through 40 years of Cold War, and it then joined together to fight in Afghanistan. In the 1980s, I would not have thought this was going to be possible.

I mean, we're going to probably debate the Iraq war for at least as long as I'm alive.

Our security depends on having good relationships with our allies. Donald Trump mainly shows contempt for them.

I like globalization; I want to say it works, but it is hard to say that when six hundred million people are slipping backwards.