Introduction [revised and updated for the English edition]. 1.The working class youth organizations at the end of 19th century : The condition of life and work of proletarian youth in Europe. The first associations of bourgeois and religious young people The first socialist youth organizations Typology of the working class youth organizations 2. The birth of the International socialist youth organization Projects for an international coordination The building of an International direction and bureau The Stuttgart Conference (1907) 3. The antimilitarist struggle Liebknecht and the militarismus Jaurès and the armed nation: antimilitarism and national question Typology of different antimilitarism movements The debate on the nature of militarism and the antimilitarist action 4. The organization of the educational work The socialist pedagogy Sport and anti-alcoholism campaign Cultural and educational activities among youth The Rekrutenschulen for social-democracy 5.Tradunionism and economic struggles organized by the socialist youth The question of apprenticeship at Stuttgart conference The professional youth organizations Economic struggle and relationship with the adult trade-unions 6.

Tasks and activities of the International secretary in Vienna, 1907-1914 Administrative and organizational activity of Vienna's international youth bureau Copenhagen Conference (1910): French youth reaches the International organization Contacts and correspondence with youth movements oversee: Northern America, Australia and Argentina. The Bureau fronting the conflict between youth organizations and adult socialist parties 7. Danger of war: international initiatives by the young socialists 1912-1914 The working class youth organizations emerging from the collapse of the Hapsburg, Tsarist and Ottoman Empires New actions in antimilitarism and the emergence of a new left among young people. Another congrès manqué: the 4th youth conference in Vienna 8.The youth international organization during the Great War, 1914-1919. The rule of the proletarian youth in neutral countries Condition of life, work and struggle of the youth during the war The Bureau's activities in Zurich and the personality its secretary, Willi Munzenberg Young people in Zimmerwald movement, the Russian revolution and the dissolution of the Socialist youth organization. Conclusions: End of an history and beginning of an historiography, 1919-1923.