Increasingly, I'm inspired by entrepreneurs who run nonprofit organizations that fund themselves, or for-profit organizations that achieve social missions while turning a profit.

[According to Twitter] 24 percent of American Twitter users are African-American. That's about twice as high as African-Americans are represented in the population.

It's becoming clear that the world is listening, so now we're trying to get new groups of people talking.

If we need simple narratives so people can amplify and spread them, are we forced to engage only with the simplest of problems?

Curators are great, but they're inherently biased. Curators are always making an editorial decision. Those biases have really big implications.

The Internet challenges traditional ways of distributing and processing information and so encourages new standards and behavior.

The uptake on mobile phones in Africa is phenomenal.