[United in difference: on the vocation of Brazilian sociology at the Instituto Universitário de Pesquisas do Rio de Janeiro, 1973-1977].

This article investigates the first generation (1973-1977) of researchers trained in the Graduate Program in Sociology at the Instituto Universitário de Pesquisas do Rio de Janeiro (IUPERJ). While IUPERJ is known as the birthplace of modern Brazilian political science, sociology there is less well known. Using documentary resources, interviews, and the secondary literature, we take a nuanced look at this generation, which has been described as both excessively heterogeneous and less original in comparison to political science at IUPERJ. For them, theoretical and methodological specialization was seen as central to a political sociology that sought responses to the demands of a society at the crossroads between modernization and redemocratization.