Facebook's headquarters is a two-story building at the end of a quiet, tree-lined street. Zuckerberg nicknamed it the Bunker. Facebook has grown so fast that this is the company's fifth home in six years - the third in Palo Alto. There is virtually no indication outside of the Bunker's tenant.

It's not my job to worry about how Left, Right will react to something. My job is, am I creating something that connects people? That's my job.

Culture is about humanizing people. You look at the African-American civil rights movement, you look at the LGBT rights movement - the culture changed before the politics did.

I'm more than willing to go to places and talk to people who believe that I am an illegal alien who deserves to be jailed. I want to look them in the eye and say, 'What makes you think I'm any different from you?' I think for our generation, immigration rights is a civil rights issue.