This paper develops a postanarchist conception of power by using Foucault to reveal some of the tensions and limitations within classical anarchist theory. As a Foucauldian poststructuralist analysis shows, the operation of power is more complex and constitutive than was allowed in classical anarchist theory, which tended to focus on state sovereignty. The revealing of the pervasiveness of power makes problematic any sort of ontological separation between society and power. However, rather than this insight undermining the possibility of anarchism – a form of radical politics that I argue is becoming more relevant today – it necessitates a certain modification of classical anarchism into postanarchism. Postanarchism might be seen as a new w...