People change their habits. I know Americans who don't go to Paris because they think it is too dangerous.

The truth is that for reasons that have a lot to do with the U.S. government bureaucracy, we settled on the one issue that everyone could agree on, which was weapons of mass destruction, as the core reason.

After a regime is removed, however, it is dangerous to leave a security vacuum.

Putin is behaving in a very dangerous way. And Donald Trump sounds as though he would simply sit back and allow that to go on. I worry about where that would end up.

History is just littered with problems that were solved that were supposed to be impossible.

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

Public action should seek to expand the set of opportunities of those who have the least voice and fewest resources and capabilities.