The army consists of the first infantry division and eight million replacements.

One interesting thing I found was that if you take an affluent modern society and collapse it during a crisis, like a war or a natural disaster, people begin relating in a more ancient, organic way. They're functioning in small interdependent groups and putting others first. And another irony is that even in terrible times, cooperating makes people feel good.

It's fun to have money, but the more money I get, the less interesting it becomes. If you don't have very much, you have to think about it. If you are starving, you become interested in food. If you are struggling to pay the bills, money becomes tragically important.

I have been working since I was 20, and I'm 38. I actually once averaged out what I had made over my professional life. I think I could have made that much as a waiter or an insurance salesman. You know, I spent so many years in my 20's making $10,000 a year.

No one will remember that President Obama supported the Arab Spring if it eventually fails and the region collapses back into the political Dark Ages. If we actively engage these movements with advice, with money, and, when necessary, with military force, then we get a vote in how it all turns out.

In some ways, risk-taking is the ultimate act of self-indulgence , an obscene insult to the preciousness of life. And yet, how can one dismiss something that persists despite every reasonable theory that it shouldn't?

If hardship brought out the worst in people, the human race wouldn't have survived. Right after 9/11, for instance, the murder rate actually went down in New York City. In World War II during the Blitz, the civilians of London were bombed almost every night for six months, but psychiatric admissions declined.