In this article Childe's commitment to internationalism and, in particular, to the International Congress of Prehistoric and Protohistoric Sciences (CISPP) is analysed. Personal correspondence between Childe and Myres and, to a lesser extent, other archaeologists, is used as the basis to consider the different stages in Childe's involvement in the CISPP. After an overview of the emergence of international congresses, the article looks at the formation of an interest group that resulted in the creation of the CISPP. The challenges brought by Nazi Germany to the international scene, and to Childe's positioning in it, are also explored. The article then examines his role in the revival of the international congress during and after the Second World War and his lesser commitment from the third conference in 1950. Finally, some comments are made on the value of archives for the history of archaeology, on the lack of connection between Childe's internationalism and Marxism, and on the need to further investigate the relationship between Childe and Myres.
