In the light of a renewed interest today in forms of direct political participation, this paper explores the contributions of Sartre and Arendt to defending direct political action as an intrinsically valuable form of human freedom. Both thinkers note, however, that such forms of action and the ‘spaces of freedom’ in which they become possible are always fleeting and transitory. The paper argues that Sartre's account of the ways in which human action is always mediated and alienated by materiality is (...) important in accounting for this phenomenon. (shrink)