This paper addresses the life and works of transnational anarchist and antifascist Camillo Berneri (1897–1937) drawing upon Berneri’s writings, never translated into English with few exceptions, and on the abundant documentation available in his archives, especially the Archivio Berneri-Chessa in Reggio Emilia (mostly published in Italy now). Berneri is an author relatively well-known in Italian scholarship, and these archives were explored by many Italian historians: in this paper, I extend this literature by discussing for the first time Berneri’s works and trajectories through spatial lenses, together with their possible contributions to international scholarship in the fields of critical, radical and subaltern geopolitics. An antifascist exile between Switzerland, France, Belgium, Netherlands, Germany and Luxembourg in 1926–1936 and then a revolutionary and antifascist fighter in Spain in 1936–1937, Berneri produced scholarly outputs which can still nourish current debates