Professor Emeritus of History
Columbia, Ph.D., 1958
Radicalism and reform, the 1960s, the Gilded Age, economic history.
The Guggenheims: A Family History, (with Debi Unger). 2005
The Best of Intentions: The Great Society Programs of Kennedy, Johnson and Nixon. Doubleday. 1995.
Turning Point, 1968, with Debi Unger. Scribners. 1988.
These United States: The Questions of Our Past. Little, Brown. 1978, 1982; Prentice-Hall. 1985.
The Vulnerable Years: The United States, 1896-1917. Dryden. 1977.
The Movement: The American New Left 1959-1973. Harper. 1973.
"The 'New Left' and American History: Some Recent Trends in United States Historiography."
American Historical Review. July 1967.
The Greenback Era. Princeton. 1965.