The genius of capitalism lies in its ability to make self-interest serve the wider interest. The potential of a big financial return for innovation unleashes a broad set of talented people in pursuit of many different discoveries. This system, driven by self-interest, is responsible for the incredible innovations that have improved so many lives.

We [Corbis] make it so easy to call up images, whether art or people or beaches or sunsets or Nobel Prize winners.

The challenge here is to design a system where market incentives, including profits and recognition, drive those principles to do more for the poor. I like to call this idea creative capitalism, an approach where governments, businesses, and nonprofits work together to stretch the reach of market forces so that more people can make a profit, or gain recognition, doing work that eases the world's inequities.

Great organizations demand a high level of commitment by the people involved.

The key thing you can do to reduce population growth is actually improve health.

... No one is less happy than I am with the performance of Microsoft stock! I've lost tens of billions of dollars this year - if you check, you'll see that's more than most people make in a lifetime!

Other paths would include making nuclear fission cheap enough and safe enough that people broadly embrace it, so that could be scaled up.