This edited volume reassesses the ongoing transnational turn in anarchist and syndicalist studies. It presents and extends up-to-date research into several dynamic historiographic fields, and especially the history of the anarchist and syndicalist movements and the notions of transnational militancy and informal political networks. Contributors include Davide Turcato, Ruth Kinna, Isabelle Felici, Kenyon Zimmer, Pietro Di Paola, Raymond Craib, Nino Kühnis, and Martin Baxmeyer.