Béatrice Joyeux-Prunel is professor and chair in Digital Humanities at the University of Geneva. She taught contemporary art history at the École normale supérieure of Paris (2006-2019). This book is a continuation of two volumes already published, on th transnational history of the avant-gardes during the periods 1848-1918 and 1918-1945 (Gallimard, Folio Histoire pocket series, 2016 and 2017).__Crédit photo © Olivier Zimmermann