Dirty War, infamous campaign waged from 1976 to 1983 by Argentina’s military dictatorship against suspected left-wing political opponents. It is estimated that between 10,000 and 30,000 citizens were killed. Many of them were “disappeared”—seized by the authorities and never heard from again. Argentina’s political evolution in the decades preceding the Dirty War was shaped by a series of transformative developments. The election of Juan Perón in 1946 ushered in a period of significant economic and...