Lawrence S. Wittner (born May 5, 1941 in Brooklyn, New York) is an American historian who has written extensively on peace movements, foreign policy, and economic inequality.
In 1974, he began teaching at the State University of New York at Albany, where he rose to the rank of Professor of History before his retirement in 2010.
His article "Peace Movements and Foreign Policy" won the Charles DeBenedetti award of the Conference on Peace Research in History in 1989, and his One World or None: A History of the World Nuclear Disarmament Movement Through 1953 received the Warren Kuehl Book Prize of the Society for Historians of American Foreign Relations in 1995.
Starting in 1961, Wittner participated extensively in the racial equality, peace, and labor movements.
He was an early civil rights and anti-apartheid activist and served for decades as an elected leader of United University Professions (the SUNY faculty-professional staff union affiliated with the American Federation of Teachers).