This piece was originally published on The Conversation (Lean Left bias). It was written by Linda R. Tropp, Professor of Social Psychology at UMass Amherst. How much do you engage with others when you’re out in public? Lots of people don’t actually engage with others much at all. Think of commuters on public transportation staring down at their phones with earbuds firmly in place. As a professor of social psychology, I see similar trends on my university campus, where...