The world today has 6.8 billion people...that's headed up to about 9 billion. If we do a really great job on vaccines, health care, reproductive health services, we could lower that by perhaps 10 to 15 percent.

If you think of global public goods like polio eradication, the kind of risk-taking new approach, philanthropy really does have a role to play there, because government doesn't do R&D about new things naturally as much as it probably should, and so philanthropy's there.

Most of our competitors were one-product wonders... They would do their one product, but never get their engineering sorted out.

In the same way that when the car got going, people thought it would be an electric car, people thought it would be a steam car.

You can always think of something like the Xbox 360 as a super set-top box that can do everything the set-top box does, but then have the graphics to do the games as well.

A bad strategy will fail no matter how good your information is. And lame execution will stymie a good strategy. If you do enough things poorly, you'll go out of business.

Everyone knows about Black Friday and Cyber Monday. Now help me spread the word about Giving Tuesday!