The gift of doubt: Albert O. Hirschman and the power of failure.

The economist Albert O. Hirschman, who died last December, loved paradoxes like this. He was a “planner,” the kind of economist who conceives of grand infrastructure projects and bold schemes. But his eye was drawn to the many ways in which plans did not turn out the way they were supposed to—to unintended consequences and perverse outcomes and the puzzling fact that the shortest line between two points is often a dead end.