Just read Arthus Müller‘s (1873-1955) #Jugend und Völkerbund. Erziehung zur Völkerbundsgesinnung (#Youth and the League of Nations) (1928). @EYY2022 triggered my interest in the genealogy of European youth cooperation. https://www.cife.eu/Ressources/FCK/files/publications/policy%20paper/2022/CIFE_Flessenkemper_European%20Year%20of%20Youth%202022.pdf