Lastly, Bensaïd talks about some polemical aspects of the Leninist theory of organisation. Bensaïd discusses the debates between Second International and Lenin. Theoretical and definitive clarifications on the concepts of party, soviet, trade union. Sovereignty of the Soviets above the party as a vanguard organisation. Bensaïd then talks about the question of programme. He underlines that the two following distinctions should be maintained and well understood to avoid complexities: party and class; system and principles. The distinction between party and class implies democratic centralisation, selection and concept of professional revolutionaries.