excerpt:
There’s a psychological term that’s used to explain why white people and black people aren’t friends: homophily. It means that people are likely to be friends with those who are similar to them. (There’s an aphorism about homophily: Birds of a feather flock together. One of the peculiar duties of social scientists is to prove the most obvious things, make them seem complicated, and then reconstitute them as simple. For examples, see the work of Malcolm Gladwell.) I would argue that the modern world is, in many quarters, dominated by increasingly extreme homophily. If you don’t want to, you’ll never have to talk to anyone whose jeans are different from yours. And there’s the trend toward so-called cultural cocooning, where you only have to listen to people who have the same opinion as you, be it on Fox or MSNBC or Lou Dobbs, depending on if your philosophy is galvanized around conservatism or liberalism or angry people with wet piano keys for teeth.
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