The previous two articles in this series[1] have to a large extent focused on the Economic and Philosophical Manuscripts of 1844 because they are a rich vein of material on the problem of alienated labor and on the ultimate goals of communism as envisaged by Marx when he first adhered to the proletarian movement. But although Marx had, as early as 1843, identified the modern proletariat as the agent of the communist transformation, the EPM are not yet precise about the practical social movement that will lead from the society of alienation to the authentic human community. This fundamental development in Marx's thinking was to come about through the convergence of two vital elements: the elaboration of the historical materialist method, and the overt politicization of the communist project.