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.

You've got to deploy serious political assets around a plan [in Darfur]. And the George W.] Bush administration has never had a plan. Ever. The Europeans don't want to do anything, saying, "The Americans are in charge of that." And in fact the Americans are in charge of naming it and bringing these resolutions every few weeks to the Security Council.

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

I think Obama is right when he talks about the rule of law as a cornerstone of what the United States should stand for.

You could be in the United Nations office all night every night and still feel like you were not making a sufficient dent in the world's problems. I think the key is prioritization. But every job presents the tyranny of the inbox, of allowing the urgent to crowd out the important. So we have to have our lodestars.

Another longstanding foreign policy flaw is the degree to which special interests dictate the way in which the "national interest" as a whole is defined and pursued.... America's important historic relationship with Israel has often led foreign policy decision-makers to defer reflexively to Israeli security assessments, and to replicate Israeli tactics, which, as the war in Lebanon last summer demonstrated, can turn out to be counter-productive.

The story of U.S. policy during the genocide in Rwanda is not a story of willful complicity with evil. U.S. officials did not sit around and conspire to allow genocide to happen.