My first job in America, after I graduated from business school, was at Harvard Business School professor Clayton Christensen’s consulting firm. Christensen, who coined the theory of disruptive innovation, was one of the most influential business thinkers of our time. CEOs flocked to him for help spotting and preempting disruption of their businesses as well as the creation of their own disruptive innovation, so he built a consulting firm to help. I was a part of that team.