I joke that I spent 38 years scouring the globe, going to war zones, trying to find the person with my exact birthday.

International institutions are composed of governments. Governments control their own military forces and police.

My second epiphany came as an intern at the Carnegie Endowment for International Peace. The man I worked for was consumed with what was going on in Bosnia. And the more I knew [about it] the more saddened I was. There were these images of emaciated men behind barbed wire.... It was like, I've got to find a way to do something.

I think we do have an interest in combating states that try to cross borders and steal parts of other people's country.

My basic feeling about military intervention is that it should be a last resort, undertaken only to stave off large-scale bloodshed.

When it came to the Vietnam War, Mr. McNamara was an early advocate of escalation but came to realize the flaws in the American approach earlier than many of his colleagues. Yet in public, he continued to defend the war.

We need to find means for cooperation.