As a young foreign correspondent, I spent a lot of time in Managua, a city that had been leveled by an earthquake in 1972. After years of war and revolution, Nicaragua was destitute; there was no money for street signs. But the Nicaraguans had a powerful collective memory, and I came to understand it as one of their great strengths. In those days, a typical Managua address might be, “Del arbolito, tres cuadras hacía el lago,” or, “From the old tree, three blocks toward the lake.” The old tree hadn’t existed for years. But everyone remembered.