Set against the backdrop of major developments in the nationalist movement in Bengal, this study focuses on the nature of the interaction between the Congress, which represented mainstream political nationalism, and popular social groups whose politics was largely disorganized. In particular, it assesses the imapct that this interplay had on the nature of the Congress and the extent to which the provincial Congress organization was able to match its aspirations to those of the people, as it matured from a loosely-structured institution to an organized politica party.