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.

We live in a fantastically wealthy country. We don't have to worry about food. We don't have to worry about clothing. We don't have to worry about our safety. 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.

I think the best way to control a population is to urbanize and to educate women. We have seen historically in many, many countries that once women are educated and have opportunities, and that happens when they live in cities and once they improve their economies, they no longer want to have eight kids.

An emerging market is a country where politics matters at least as much as economics to the market.