Daniel E. Gasman (1933 – 19 December 2012)[1] was an American historian at John Jay College and the Graduate Center at City University of New York.[2] He earned his PhD from University of Chicago in modern intellectual history.[2] His most famous book is The Scientific Origins of National Socialism,[3] which has been both praised[4][5][6] and criticized[7] by scholars. His second book, Haeckel’'s Monism and the Birth of Fascist Ideology, has been reviewed in journals.[8][9][10][11]