This book traces the spread of a global anti-imperialism from the vantage point of Paris between the two World Wars, where countless future leaders of Third World countries spent formative stints. Exploring the local social context in which these emergent activists moved, the study delves into assassination plots allegedly hatched by Chinese students, demonstrations by Latin American nationalists, and the everyday lives of Algerian, Senegalese, and Vietnamese workers. On the basis of police reports and other primary sources, the book foregrounds the role of migration and interaction as driving forces enabling challenges to the imperial world order, weaving together the stories of peoples of three continents. Drawing on the scholarship of twentieth-century imperial, international, and global history as well as migration, race, and ethnicity in France, it ultimately proposes a new understanding of the roots of the Third World idea.