All who are interested in such diverse topics as the history of immigration to the United States, the diffusion of socialist and anarchist ideas, and the international labor movement will rejoice at the publication of Michel Cordillot's superb biographical dictionary. It makes visible social actors who have been totally ignored by scholars until recently and reveals the existence of a significant francophone social movement in the United States. It also revises and enlarges our knowledge of utopian communities, socialist and anarchist movements, illuminating especially the linkages that developed between the old and the New World. The book begins with a brief, detailed, and stimulating introduction that suggests new ways to study migration, the processes of integration, and the formation of political organizations among expatriates. Aside from tracing the history of individual lives and francophone groups, Cordillot's approach gives special priority to the constant interaction of individuals and collective organizations rather than focusing primarily on ideology, political platforms, and organizational structures.