The world at large is less inequitable today than at any time in history. Number of people in abject poverty, as a percentage, is at all-time low.

I like my job because it involves learning. I like being around smart people who are trying to figure out new things. I like the fact that if people really try they can figure out how to invent things that actually have an impact.

Microsoft has had many, many successful products. I'm committed to one company. This is the industry I've decided to work in.

I would counsel people to go to college, because it's one of the best times in your life in terms of who you meet and develop a broad set of intellectual skills.

According to Ethiopian custom, parents wait to name a baby because children often die in the first weeks of life.

[Smart] is an elusive concept. There's a certain sharpness, an ability to absorb new facts. To ask an insightful question. To relate to domains that may not seem connected at first. A certain creativity that allows people to be effective.

Ninety percent of the cases of polio are in security-vulnerable areas.