Nietzsche never mentioned Karl Marx or Friedrich Engels by name, and it is unclear whether he was acquainted with their ideas. However, they are more or less extensively quoted and discussed in eleven books that Nietzsche owned in his personal library and in one of them he underlined Marx's name.Brobjer, T.H. (2008) Nietzsche's Philosophical Context: An Intellectual Biography. University of Illinois Press, 2008. p. 70 In socialist countries Nietzsche was usually considered a disreputable reactionary, burgeois, imperialist or fascist philosopher. His books were unavailable to the public in the Soviet Union since 1923. They were placed on the list of forbidden books and were kept in libraries only for restricted, authorized use. Until 1988 they were not translated or reprinted, and in the years between 1938 and 1988 only ten dissertations on Nietzsche were defended.Sineokaya, Y. (2018) The prohibited Nietzsche: anti‑Nitzscheanism in Soviet Russia. Studies in East European Thought. Springer Nature B.V. 2018. Western Leftist writers, led by French postwar intellectuals, largely rehabilitated Nietzsche on the Left and have proposed ways of using Nietzschean theory in what has become known as the "politics of difference" — particularly in formulating theories of political resistance and sexual and moral difference.
