In retrospect, I do think it's fair to say that we were overly idealistic and focused on more of the good parts of what connecting people and giving people a voice can bring.

There are disasters that happen - Hurricane Harvey came up, and you had people self-organizing through the community and getting in boats and driving around rescuing people coordinated ad hoc through this network. That's not a media function.

When people are connected, we can just do some great things. They have the opportunity to get access to jobs, education, health, communications. We have the opportunity to bring the people we care about closer to us. It really makes a big difference.

Advertising works most effectively when it's in line with what people are already trying to do. And people are trying to communicate in a certain way on Facebook - they share information with their friends, they learn about what their friends are doing - so there's really a whole new opportunity for a new type of advertising model within that.

I do think that we're gonna move towards this world where eventually you'll be able to capture a whole experience that you're in and be able to send that to someone.

Just take terrorism, for example. We have a team of more than 200 people working on counterterrorism. I mean, that's pretty intense. That's not like what people think about what Facebook is.

What we will do is we'll say, 'Okay, you have your page, and if you're not trying to organize harm against someone, or attacking someone, then you can put up that content on your page, even if people might disagree with it or find it offensive.' But that doesn't mean that we have a responsibility to make it widely distributed in News Feed.

Bill Gates has always been a mentor and inspiration for me even before I knew him. Just growing up, I admired how Microsoft was mission-focused.

I actually think people generally have an awareness and feel like, 'Wow, these networks have a lot of information.'

I always tell people that you should only hire people to be on your team if you would work for them.