“I think the thing that made it easier for us is 1) I was more senior than him at McKinsey, and I was actually his manager at McKinsey. 2) I think the skillset for being CEO, a lot of which is being public-facing and being a good storyteller to investors and the media is something I do naturally well, and it's something he doesn't like doing. 3) The third piece was neither of us has a lot of ego. We just wanted to build a really great company that served a lot of people. So I don't think you saw the ego-dynamics that sometimes befalls other co-founder relationships.”