I personally don't invest in a lot of companies because I think it would be a conflict of interest and Facebook doesn't typically either.

When you give everyone a voice and give people power, the system usually ends up in a really good place. So, what we view our role as, is giving people that power.

Facebook is inherently viral. There are lots of sites that include a contact importer, and for lots of them it doesn't really make sense. For Facebook it fits so well. It wasn't until a few years in that we started building some tools that made it easier to import friends to the site. That was a huge thing that spiked growth.

I started the site when I was 19. I didn't know much about business back then.

Openness fundamentally affects a lot of the core institutions in society - the media, the economy, how people relate to the government and just their leadership.

It occurred to me that building a company was the best way to align a group of people towards building something great. And its really... it's a good organizational structure where you can really reward people. If they're building something that's good, you can you work with partners and reward them if the product that you're developing work well. It's a good way to get the best people involved to build something very good.

Connecting the world is really important, and that is something that we want to do. That is why Facebook is here on this planet.