Investing in tomorrow's technology today is more critical than ever.

We make the future sustainable when we invest in the poor, not when we insist on their suffering.

Looking at these issues as a businessman, I believe that investing in the world's poorest people is the smartest way that our government spends money.

If you withdraw the incredible focus on polio, it will spread back, and in poor countries you'll get something like 100,000 cases a year. So by being very intense and getting the cases down to zero, what you do is you avoid all the future cases.

Philanthropy, although it's tiny compared to the government, it's 2% of the US economy, which is the largest percentage, other than the Middle East.

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.

A first-generation fortune is the most likely to be given away, but once a fortune is inherited it's less likely that a very high percentage will go back to society.