WILLIAM E. LEUCHTENBURG, professor emeritus at the University of North Carolina at Chapel Hill, is a noted authority on twentieth-century American history. Winner of both the Bancroft and Parkman prizes, he is the author of more than a dozen books. A Guggenheim Fellow and a Mellon Senior Fellow, he has been elected president of both the American Historical Association and the Organization of American Historians. In 2008, he was chosen as the first recipient of the Arthur M. Schlesinger Jr. Award for Distinguished Writing in American History of Enduring Public Significance.