Academics were not a challenge when I was fifteen in college. The challenge was figuring out how to fit in socially.

I believe that if you go and ask a chief executive of a Goldman Sachs or a BP, and they answer you honestly they want monopolies, they want government subsidies, they want preferences - they're not interested in free markets.

In the nearer term, the likeliest source of risk is a conflict between China and the U.S. These are now the two largest economies in the world, and the combination of their economic interdependence, the sharp differences in their political and economic values, and the growing divergence in their interests makes this relationship potentially dangerous for everyone who might be affected by it - which means pretty much everyone.

There is always the risk that a conflagration in the Middle East becomes larger and more dangerous. In this scenario, we discover that the Arab Spring was merely the prelude to a deeper and much farther-reaching upheaval in the region that has greater impact on countries like Iran and Saudi Arabia.

I don't take things off. I either check things off or I add things.

The two world wars boosted American power and devastated potential rivals to an extent that could not have lasted more than a few decades.

We're wealthy people. We're sitting here in New York, Washington. We live in a fantastically wealthy country. We don't have to worry about food. We don't have to worry about clothing. We wore the same shirt. We don't have to worry about our safety. It's very easy for us to be environmentalists. It's very easy for me to be an environmentalist. It's very easy for me to care about making sure that we protect the forests and the whales, and all that stuff. It's very hard for someone who makes $1,000 a year or some who makes less than $1 a day to care about the environment.