Interacting with people who don’t share our perspective forces us to rethink our ideas, strengthen our ideas, or trade our ideas for better ones. When you’re only interacting with like-minded people all the time, there’s less and less opportunity to be changed. Everybody knows that feeling you get when you’re hanging out with people who love the same art, listen to the same music, and watch the same movies: It’s comforting at first, but it can also become incredibly boring and ultimately stifling.
