Here's his words from today's senate hearing: "Overall, I would say that we’re going through a broader philosophical shift in how we approach our responsibility as a company. For the first 10 or 12 years of the company, I viewed our responsibility as primarily building tools that if we could put those tools in people’s hands, then that would empower people to do good things. What we’ve learned now across a number of issues, not just data privacy but fake news and foreign interference in elections, is we need to take a more proactive role and a broader view of our responsibility. It’s not enough to just build tools. We need to make sure they’re used for good and that means that we need to now take a more active view in policing the ecosystem and in watching and kind of looking out and making sure that all of the members in our community are using these tools in a way that’s going to be good and healthy"