Lenin’s purpose in writing this work was, as he stated at the beginning of chapter 1, to clearly demonstrate the “unprecedentedly widespread distortion of Marxism” on the question of the state and the proletarian revolution then prevailing in the international socialist movement by re-establishing what Marx and Engels themselves had written on this subject. Most of the book therefore takes the form of an extended commentary, with extensive quotations, on the writings of Marx and Engels. It then deals with the person “who is chiefly responsible for these distortions”, namely, Karl Kautsky, the editor of Neue Zeit, the theoretical journal of the German Social-Democratic Party (SPD) and the best-known leader of the Second International, the international association of socialist parties founded in Paris in 1889.