One thing I have reflected on is that when I started Facebook, the mission of connecting the world was not controversial. It was kind of as if it was a default assumption that people had - every year the world got more connected - and that seems like the direction that things were heading in.

We talk about this concept of openness and transparency as the high-level ideal that we're moving towards at Facebook. The way that we get there is by empowering people to share and connect. The combination of those two things leads the world to become more open.

No one has done a study on this, as far as I can tell, but I think Facebook might be the first place where a large number of people have come out. We didn't create that - society was generally ready for that. I think this is just part of the general trend that we talked about, about society being more open, and I think that's good.

What Facebook stands for in the world is giving people a voice and spreading ideas and rationalism.

After launching the first version of Facebook for a few thousand users, we would discuss how this should be built for the world. It wasn't even a thought that maybe it could be us. We always thought it would be someone else doing it.

I updated my grilling app, iGrill, today and it now has Facebook integration that lets you see what other people are grilling right now around the world. Awesome.