son of Arthur Meier Schlesinger (1888–1965) and like his father a professor of history at Harvard (1946–61), is the author of Orestes A. Brownson (1939) and The Age of Jackson (1945, Pulitzer Prize), in which the struggle of Jacksonian Democracy is shown to be not against Hamiltonian conservatism but against the traditional antistatism of the Jeffersonians. His Age of Roosevelt includes The Crisis of the Old Order (1957), The Coming of the New Deal (1959), and The Politics of Upheaval (1960). The Politics of Hope (1962) contains essays. He served as a special assistant to President Kennedy, about whose administration he wrote A Thousand Days (1965, Pulitzer Prize, National Book Award). The Bitter Heritage (1967) treats the effects of American involvement in Vietnam, and The Crisis of Confidence (1969) gathers essays on the U.S. in the 1960s. The Imperial Presidency (1973) traces the growth of presidential power. Robert F. Kennedy and His Times (1978, National Book Award) treats another member of the family to which he has been close.