This article examines the role of radio in advancing activist participation in a Mexican social movement, the Popular Assembly of the People of Oaxaca (APPO). I show how APPO radio stations elicited shared emotional connections and experiences for movement activists and potential allies within the community of radio listeners. The radio served as a backbone for the construction and negotiation of a collective identity. Using the 2006 Oaxacan uprising as a case study, I analyze the importance of radio in generating the tools necessary for mobilization, collective identity, and democratic participation.
