In Germany, between the two World Wars, Rudolf Laban and a group of dancers and pedagogues developed "movement choirs": choral dances that have marked the history of dance and continue to be recreated today. Highlighting their heterogeneity and multiplicity, this book – based on Albrecht Knust's archives deposited at the CND media library – shows how these choreographic practices question our relationship with tradition, gymnastic practices and the idea of the collective.