I was raised in a working-class family on Long Island and didn’t step on an airplane until I was 18. For us, a trip to the Jersey Shore was quite a treat. Even though I wasn’t well traveled, I learned a lot about diversity in my own neighborhood. Long Island was a melting pot, and I worked a lot of jobs—a paper route, pumping gas, stocking shelves in a grocery store—that taught me to deal with all kinds of people. In high school I bought the small delicatessen where I worked when it was facing a distress sale. I borrowed $7,500, including interest, and promised to pay it back in a year. I managed the deli myself and used the profits to help my family and to put myself through college. Dealing with 500 customers a day helped me develop empathy for other people and realize how a small gesture like giving a customer credit—or even just respect—can make a big difference. That’s a universal concept that applies anywhere in the world.

A version of this article appeared in the November 2016 issue (pp.35–38) of Harvard Business Review.