If we want to have the biggest impact, the best way to do this is to make sure we always focus on solving the most important problems.

At Facebook, we build tools to help people connect with the people they want and share what they want, and by doing this we are extending people's capacity to build and maintain relationships.

Connecting everyone is going to be something that no single company can do by themselves. So I'm really glad that they and a lot of other companies are working on this.

I think people tend to be worried about every new technology that comes along.

A lot of the time the experts, the people who are supposed to be able to tell you what to do, will tell you that you can't do something even when you know you can. And a lot of the time it's your friends ... who tell you you can do it.

We're really at this point where we can take a step back and think about the next big things that we want to do.

If you recognize that self-driving cars are going to prevent car accidents, AI will be responsible for reducing one of the leading causes of death in the world.