Nevertheless, the origins of their ideology on the left are still apparent. The fact that most of the younger neocons were never on the left is irrelevant; they are the intellectual (and, in the case of William Kristol and John Podhoretz, the literal) heirs of older ex-leftists. The idea that the United States and similar societies are dominated by a decadent, postbourgeois "new class" was developed by thinkers in the Trotskyist tradition like James Burnham and Max Schachtman, who influenced an older generation of neocons. The concept of the "global democratic revolution" has its origins in the Trotskyist Fourth International's vision of permanent revolution. The economic determinist idea that liberal democracy is an epiphenomenon of capitalism, promoted by neocons like Michael Novak, is simply Marxism with entrepreneurs substituted for proletarians as the heroic subjects of history.