Subtitle: Whites, race, class, and the things that never get said. My younger son goes to Temple, where he’s a sophomore. This year he’s living in an apartment with two friends at 19th and Diamond, just a few blocks from campus. It’s a dangerous neighborhood. Whenever I go see Nick, I get antsy and wonder what I was thinking, allowing him to rent there. One day, before I pick him up for lunch, I stop to talk to a cop who’s parked a block away from Nick’s apartment. “Is he already enrolled for classes?” the cop says when I point...