Kenneth T. Jackson is the Jacques Barzun Professor of History at Columbia University and a former president of the Urban History Association, the Society of American Historians, the Organization of American Historians, and the New-York Historical Society. His many books include Crabgrass Frontier: The Suburbanization of the United States; The Encyclopedia of New York City; Empire City: New York Through the Centuries; and The Ku Klux Klan in the City, 1915–1930. In addition to the Francis Parkman and Bancroft Prizes and four honorary degrees, he is an elected member of the American Academy of Arts and Sciences. In 2001 he served as New York State Scholar of the Year. His famous all-night bicycle ride through the city has been an annual event at Columbia since 1975.