Investigating the period of emergence of Marxism as a tradition between 1865 and 1895, this work examines some key questions elucidating Trotsky's theoretical developments during the first decade of the XXth century. Emphasizing the role of such authors like Plekhanov, Johann Baptists von Schweitzer, Lenin and Zetkin in the developing of a 'Classical Marxism' that served as the foundation of the first formulation of Trotsky's theory of permanent revolution, it treats three introductory dimensions of this larger problematic: primitive communism and its feminist implications, the debate on the relations between the productive forces and the relations of production, and the first apprehensions of Marx's economic mature works