Thomas G. Stemberg

At the Harvard Business School, I really felt I had gained the ability to resolve difficult issues. But I also felt that I wasn't in the mainstream with my fellow students. During job-hunting season, for example, everybody shaved their beards for interviews. I thought, 'This is crazy.' So I grew a beard.

One of the people who most influenced me was Ben Shapiro, a marketing professor at the business school. He used to rant and rave and pound his fist: 'It's all about the customers!' And he was right. He was also right that, at that time, retailing was devoid of really talented people; he urged me to go in that direction.

Every time you log in to Facebook, every time you click on your News Feed, every time you Like a photo, every time you send anything via Messenger, you add another data point to the galaxy they already have regarding you and your behavior.