“In Port Richmond, a working-class neighborhood in Philadelphia, the houses all have doorbells. Go a few blocks south, to the gentrifying neighborhood of Fishtown, and you’ll hardly find any. Many of the freshly slapped together, space-ship-like condos that have blanketed the neighborhood aren’t even built with them in the first place; or they’re behind massive gates, with buzzers that connect to the residents’ cell phones. You might reach them, in other words, but they might not be home. In Port Richmond, however, neighbors park lawn chairs on the sidewalk or sit on stoops and talk to each other for hours, when the weather’s nice.”