Gabriel Morris Kolko (August 17, 1932 – May 19, 2014) was an American historian. His research interests included American capitalism and political history, the Progressive Era, and U.S. foreign policy in the 20th century. One of the best-known revisionist historians to write about the Cold War, he had also been credited as "an incisive critic of the Progressive Era and its relationship to the American empire." U.S. historian Paul Buhle summarized Kolko's career when he described him as "a major theorist of what came to be called Corporate Liberalism...[and] a very major historian of the Vietnam War and its assorted war crimes."