The Hungarian theorist Georg Lukacs contributed to an understanding of the relationship between historical materialism and literary form, in particular with realism and the historical novel. Walter Benjamin broke new ground in his work in his study of aesthetics and the reproduction of the work of art. The Frankfurt School of philosophers, including most notably Max Horkheimer, Theodor Adorno, and Herbert Marcuse—after their emigration to the United States—played a key role in introducing Marxist assessments of culture into the mainstream of American academic life. These thinkers became associated with what is known as "Critical theory," one of the constituent components of which was a critique of the instrumental use of reason in advanced capitalist culture. "Critical theory" held to a distinction between the high cultural heritage of Europe and the mass culture produced by capitalist societies as an instrument of domination. "Critical theory" sees in the structure of mass cultural forms—jazz, Hollywood film, advertising—a replication of the structure of the factory and the workplace. Creativity and cultural production in advanced capitalist societies were always already co-opted by the entertainment needs of an economic system that requires sensory stimulation and recognizable cliché and suppressed the tendency for sustained deliberation.