Alexander Keyssar (born May 13, 1947)[1] is an American historian and the Matthew W. Stirling Jr.

Professor of History and Social Policy at the Kennedy School of Government at Harvard University.

[2] Alex graduated summa cum laude with a degree in English Literature from Harvard College in 1969.

In 1977 he graduated from Harvard University with a PhD in the History of American Civilization.

He taught at Brandeis University, Duke University, and Massachusetts Institute of Technology.