Abstract
This paper explores the implications of Zeynep Tufekci’s capacities approach to social
movements, which explains the strength of social movements in terms of their capacities. Tufekci
emphasises that the capacities of contemporary social movements largely depend upon their uses of new
digital technologies, and of social media in particular. We show that Tufekci’s approach has important
implications for the structure of social movements, whether and what obligations they can have, and for
how these obligations distribute to their members. In exploring these implications, we develop a tripartite
taxonomy of social movements. Each type of social movement in the taxonomy corresponds to a different
type of group: social campaigns, social struggles, and social agitations. We show that all three types of
social movement can bear obligations in virtue of their capacities. Finally, we argue that a surprising upshot
of the obligations of social movements is that members of oppressed groups can have obligations to resist
their own oppression in virtue of being members of social movements.