Support WBURThe Central Question Behind Facebook: 'What Does Mark Zuckerberg Believe In?'Play45:07Download AudioDave DaviesOctober 04, 2018 Share"To an extraordinary degree, Mark Zuckerberg is Facebook ... so if you're going to understand Facebook in any meaningful way, the conversation really has to start with him and end with him," journalist Evan Osnos says. (Getty Images)
