Daniel J. Kevles (born 2 March 1939 in Philadelphia, Pennsylvania) is an American historian of science best known for his books on American physics and eugenics and for a wide-ranging body of scholarship on science and technology in modern societies. He is Stanley Woodward Professor of History, Emeritus at Yale University and J. O. and Juliette Koepfli Professor of the Humanities, Emeritus at the California Institute of Technology.[1][2]