When I ask people close to Zuckerberg how, exactly, he has pulled off these achievements, I don’t hear a lot of anecdotes about him swooping in and personally making genius-level decisions that suddenly changed everything. Instead, they praise his inquisitiveness, persistence, ability to deploy resources, and devotion to improving Facebook and himself. He has a knack for carving up grand plans into small, doable victories. "Most of our conversation was about long-term strategy, and then we’d backtrack from there to what we should do over the next month," says Bret Taylor, who worked as Facebook’s CTO from 2009 to 2012 and who was at the company