content: 29cb                 After reading his entire post, I don’t think he is leaving mainly because it’s a hostile environment. It is to some extent—and he says so—but the big issue is how the company balances offensive and hateful speech with freedom of expression. He doesn’t feel their political monoculture is able to discuss these things. Instead they’re drifting. He’s someone who doesn’t have to hang on to any job that will put food on the table, so he’s able to think about his lifelong impact on the world and act on that.  My professional purpose has always been to "amplify human capability and raise standards,"  He feels he can do better elsewhere and he is diving right into starting a new company with a friend of his. Again, having some wealth built up to let you spend a few years trying something new is a luxury we don’t all have. He does, and he’s not inspired by what he thinks he’ll achieve in the long term at Facebook.