In the origins of the permanent revolution is not a scholarly biography of the young Trotsky, but the committed evocation of a political, theoretical and militant itinerary. Throughout the work, therefore, the author strives to follow the sinuosities of this complex, often contradictory itinerary: from anti-Marxism to the "Iskristian" Marxism of the very young Bronstein, from the virulent anti-Bolshevism of 1904 to the critical Bolshevism of 1917. In this first phase of Trotsky's political life, "Trotskyism" walks with a lame limb: it is the time of the first development of the theory of the permanent revolution, based on the brilliant intuition of the profile of the Russian revolution, and also the epoch Trotsky's "unfortunate" politics, stuck in the quagmire of conciliationism and equilibrium, in the midst of the two factions of the Russian Social Democracy. The author concludes with an evocation of 1917. The October revolution does not only mean Trotsky's rise to the historical dimension. On the theoretical level, it represents for Trotsky the second fundamental mutation, the one that leads him to fuse the theory of permanent revolution in the political and organizational melting pot of Bolshevism. The book includes three texts published by Trotsky between 1906 and 1908: The Duma and the Revolution, The Third Duma, and The Council of Workers' Deputies and the Revolution.