Alfred Métraux was part of a prolific moment in which French sociology and ethnology were enlarging their scientific scope and advancing toward new fields. Following the colonial expansion of France, Métraux participated in establishing ethnographic methods for codifying social life, material culture, and artistic forms. Through his own transatlantic voyages and personal exchanges, Métraux left personal documents in different parts of the world. Consequently, many are the archives that hold parts of his personal collections, letters, and published or unpublished materials. In addition, because of Métraux’s own cosmopolitanism, studies on the ethnologist’s life and works can be found in different languages. Métraux meticulously collected artifacts and documents from different cultures, and these items are now part of collections in museums in Argentina, France, and the United States. The multiplicity of themes Métraux dedicated himself to during his life reveal logics and developments of his work, as well as the importance of fieldwork to his making as an anthropologist, or a “man of the field,” as he used to describe himself. His intense and long-term relationship with Haitian Vodou was central in his career as it arose from his early interest in vanishing civilizations, religious systems, and material culture, and defined his personal agenda for future research.