2021 Reprint of the 1935 Edition. Leninism or Marxism? was first published as an article in 1904 under the title "Organizational Questions of the Russian Social Democracy" and later reprinted in pamphlet form titled Marxism vs. Leninism in 1935 by the Anti-Parliamentary Communist Federation. Rosa Luxemburg's critique of Lenin's concept of revolutionary organization show the disagreements within the Marxist movements in Europe in the years...