Radical theory has always been beset by the question of ontology, albeit to varying degrees and under differing conditions. In recent years, in particular, political metaphysics has returned with force: the rise of Deleuze-influenced “new materalism”, along with post-/non-Deleuzean speculative realism and object-oriented ontology, all bear testament to this. In this same period, anarchism has returned as a major influence on social movements and critical scholarship alike. What then, are some of the potential resonances between these currents, particularly given that anarchism has so often been understood/misunderstood as a fundamentally idealist philosophy?