A walk through the remnants of a social democratic America, and an argument about its future. In the 1960s, a novel ideology about cities, and what was best for them, emerged in New York. Pushing against the state planning of the time, it held that cities were at their best when they were driven from the bottom-up and when organic, unplanned processes were allowed to run their course, in a spontaneous "ballet of the street". Cities were...