Marxist humanism is a branch of Marxism that primarily focuses on Marx's earlier writings, especially the Economic and Philosophical Manuscripts of 1844 in which Marx espoused his theory of alienation, as opposed to his later works, which are considered to be concerned more with his structural conception of capitalist society. The Praxis School, which called for radical social change in Josip Broz Tito's Yugoslavia in the 1960s, was one such Marxist humanist movement.
Marxist humanism was opposed by the "antihumanism" of Marxist philosopher Louis Althusser, who described it as a revisionist movement.
The term "Marxist humanism" at the notion of alienation remains a part of Marx's philosophy. Teodor Shanin and Raya Dunayevskaya go further, asserting that not only is alienation present in the late Marx, but that there is no split between the young Marx and mature Marx.
The early Marx, influenced by Feuerbach's humanistic inversion of Hegelian idealism, articulated a concept of species-being, according to which man's essential nature is that of a free producer, freely reproducing their own conditions of life. However, under capitalism individuals are alienated from their productive activity insofar as they are compelled to sell their labor-power as a commodity to a capitalist; their sensuous life-activity, or labor, thus appears to them as something objective, a commodity to be bought and sold like any other. To overcome alienation and allow man to realize his species-being, therefore, the wage-labor system itself must be transcended, and the separation of the laborer from the means of labor abolished.