MARTIN J. SHERWIN, was University Professor of History at George Mason University and the author of A World Destroyed: Hiroshima and Its Legacies, winner of the Stuart L. Bernath and the American History Book prizes, and the coauthor, with Kai Bird, of American Prometheus: The Triumph and Tragedy of J. Robert Oppenheimer, which won the Pulitzer Prize for biography in 2006 as well as the National Book Critics Circle Award and the Duff Cooper Prize. He died in 2021.