Russian revolutionaries reading Marx looked in vain for a comprehensive organizational and tactical framework for political parties. The theoretician Plekhanov, who adapted Marx to Russian socialism, relied upon the definition of the Party found in the Communist Manifesto: Communists do not form a separate party opposed to other working–class parties [...] (they are) the most advanced and resolute section of the working–class parties of every country, that section which pushes forward all others [...] they have over the great mass of the proletariat the advantage of clearly understanding the line of march, the conditions, and the ultimate general results of the proletarian movement.