Who is the real Mark Zuckerberg?

Who is the real Mark Zuckerberg?, BBC News, 3 December 2011.

At Harvard, alongside computer science, Zuckerberg also studied psychology. He says Facebook springs from both disciplines: “Those two things together really represent the DNA of Facebook… There are a lot of great technology companies and there are people who think about social issues, but there aren’t a lot people doing both.”