DescriptionPsychoanalytic scholarship from the Latin American region is not well represented in the broader psychoanalytic discourse in the United States. The purpose of this dissertation is to research the contributions of notable psychoanalyst Enrique Pichon Rivière [1907-1977], a pioneer from Argentina who influenced the first generation of psychoanalysts from the Río de la Plata region of Latin America and the broader South American psychoanalytic community. Pichon Rivière’s theoretical corpus is an innovative attempt toward a relational and group-based conception of subjectivity. It attempts to integrate the socio-cultural realm in conceptions of the psyche and clinical intervention. Pichon Rivière was the teacher of notable psychoanalysts from the Río de la Plata region, Willy & Madeleine Baranger, who conceptualized the psychoanalytic situation as intersubjective. Recent trends towards relationality and intersubjectivity in American psychoanalytic psychotherapy suggest Pichon Rivière’s theoretical corpus is highly relevant to current practice and deserves an in-depth review. The present study attempts to explain Pichon Rivière’s theoretical corpus, connect Pichon Rivière’s teachings to the theoretical developments of Willy and Madeleine Baranger, establish links between Pichon Rivière’s theory and American interpersonal and relational psychoanalysis, and explore parallels between Pichon Rivière’s upbringing and his writings.