The English and French Wikipedia articles on “Marxist Humanist” state that the Frankfurt School (Herbert Marcuse, Walter Benjamin, Erich Fromm), and people related to it like André Gorz, belonged to this school of thought.
Really? I mean, to me, these people are quite anti-science, with their promotion of pseudo-scientific psychoanalysis, existentialism, and a harsh criticism of the industrial society. Walter Benjamin was a mystic, a romantic, an idealist: what is the relation with humanism?
Reading the book of Lamont The philosophy of humanism (1997), where he states (p. 29):
Finally, we find in the category of naturalistic Humanists the followers of Karl Marx, who call themselves variously Marxists, Communists, or Socialists. On economic, political, and social issues the Marxist Humanists are of course much to the left of the other types of Humanists I have described. Ordinarily they use the formidable phrase Dialectical Materialism to designate their philosophy, though they often talk in a general way about the Humanist civilization of Soviet Russia and of the socialist world. The Marxist materialists disagree sharply on certain philosophic issues with me and with other Humanists, particularly in their ambiguous attitude toward democracy and their acceptance of determinism.
They are, however, unquestionably humanistic in their major tenets of
_rejecting the supernatural and all religious authority,
_of setting up the welfare of humankind in this life as the supreme goal,
_and of relying on science and its techniques
So I feel quite confused.