You could probably go all the way back to the first books. I bet people said 'why should you read when you could talk to other people?' The point of reading is that you get to deeply immerse yourself in a person's perspective. Right? Same thing with newspapers or phones or TVs. Soon it will be VR, I bet.

Whenever I go to a new city, in order to help get on the right time zone and actually get a chance to see that city, I like running.

Virtual Reality is going to be an important technology. I am pretty confident about this.

If you want to be free, or you want to preserve freedom for people, you both need to have laws that make it so people have freedom of speech and all the freedoms that they need. You also need to have an open governance system where people can vote and people have representation.

The real question for me is, do people have the tools that they need in order to make those decisions well? And I think that it's actually really important that Facebook continually makes it easier and easier to make those decisions... If people feel like they don't have control over how they're sharing things, then we're failing them.

All of my friends who have younger siblings who are going to college or high school - my number one piece of advice is: You should learn how to program.

If Facebook were a country, it would be the 8th most populated in the world, just ahead of Japan.