This is the first study to provide a comprehensive picture of the revolt brought about by American radical historians in the 1960s and 1970s. With the turbulent sixties as a backdrop, the work of radical luminaries like Eugene Genovese, Herbert Gutman, Staughton Lynd, William Appleman Williams and Howard Zinn is discussed. These historians made a significant contribution to present-day notions about slavery, working-class history, the New Deal, the Cold War and a wealth of other subjects. Their main target was American liberalism. Radical criticism centered on the liberal concepts of the division of power and of the nature of man. The acrimonious debate which ensued tore the historical profession apart. Therefore most historians have stressed the disagreements between liberals and radicals. Yet, in this study it will be argued that in some respects the radicals were part and parcel of mainstream historiography, though they presented a radical version of it.