Hirschman published his first important book, “The Strategy of Economic Development,” in 1958. He had returned from Colombia by then and was at Yale, and the book was an attempt to make sense of his experience of watching a country try to lift itself out of poverty. At the time, he was reading deeply in the literature of psychology and psychoanalysis, and he became fascinated with the functional uses of negative emotions: frustration, aggression, and, in particular, anxiety. Obstacles led to frustration, and frustration to anxiety. No one wanted to be anxious. But wasn’t anxiety the most powerful motivator—the emotion capable of driving even the most reluctant party toward some kind of solution?