The Frankfurt School philosopher Herbert Marcuse (1898–1979) studied with Martin Heidegger at Freiburg University from 1928 to 1932 and completed a dissertation on Hegel’s theory of historicity under Heidegger’s supervision. During these years, Marcuse wrote a number of provocative philosophical essays experimenting with the possibilities of Heideggerian Marxism. For a time he believed that Heidegger’s ideas could revitalize Marxism, providing a dimension of experiential concreteness that was sorely lacking in the German Idealist tradition. Ultimately, two events deterred Marcuse from completing this program: the 1932 publication of Marx’s early economic and philosophical manuscripts, and Heidegger’s conversion to Nazism a year later. Heideggerian Marxism offers rich and fascinating testimony concerning the first attempt to fuse Marxism and existentialism. nbsp; These essays offer invaluable insight concerning Marcuse’s early philosophical evolution. They document one of the century’s most important Marxist philosophers attempting to respond to the “crisis of Marxism”: the failure of the European revolution coupled with the growing repression in the USSR. In response, Marcuse contrived an imaginative and original theoretical synthesis: “existential Marxism.”