People think about this idea that there's 122 million kids that are alive that would not be if that fatality rate had stayed at the 1990 level, that's 122 million families.

The future of advertising is the Internet.

Online education is pretty special for two reasons. One is that you can get the very best lecture in the world and wherever you are, whenever you want, you can connect to that lecture. The other is this interactivity, where if you know a topic, you can kind of skip over it. Or if you're confused about it, [the area] where you're confused can be analyzed by software.

We need a malaria epidemic in the blogging community! Either that or we need people who have seen the malaria epidemic to start blogging.

When the PC was launched, people knew it was important.

Energy is actually harder; it takes more time to get a product, but if you do it's a very, very big market and the constraints of doing that in a clean way are more obvious all the time.

The returns from investing in poor people are just as great as the returns from investing in the business world... and have even more meaning