9/11 was a genuine trauma, and President George W. Bush rallied the country. I think the Iraq war was ill-considered, but there - it was done in the wake of a national trauma. And that the errors made under such circumstances are different than errors made in the cold.

Nationalism is like cheap alcohol. First it makes you drunk, then it makes you blind, then it kills you.

George W. Bush tried working with the Russians after 9/11; Obama had the reset. Both presidents achieved less than they wanted, but they both achieved something. Those policies made sense, and it's to the credit of both Presidents Bush and Obama that even as they reached out to Russia, they did not sacrifice core American interests, or core American values. We didn't give the Russians on the altar of better relations other countries. We were able to do two things at once.

Be careful about a policy generated with enthusiasm in the rush of a moment. It usually doesn't turn out well.

We`re a little bit low in the 1970s, right, post-Vietnam, Watergate era, malaise, all that, but this is more like the 1930s where the very notion of liberal democracy is being questioned, and that is disturbing.

America's security and prosperity didn't work unless other nations were also secure, and prosperous. There had to be something in it for them, so we weren't looking simply to grab territory, or widen our sphere of influence, or anything like that. We wanted to make the world a better place, and get very rich in the process.

Remember, the American grand strategy works when other countries feel secure. But it doesn't work if we acquiesce in the aggression of other countries.