The impoverishment of mainstream International Relations (IR) scholarship, especially as it is practised in the bastions of academic power and respectability in the United States, can be registered in terms of its wilful and continuing conceptual blindness to mutually constitutive relations of governance/resistance at work in the production of global politics. This has been underscored in recent years by the rise of powerful transnational social movements seeking to reform or transform global capitalism, a coalition of coalitions recently reincarnated in the form of a global peace movement opposing the blatantly neo-imperial turn in US foreign policy. As the essays in this Special Issue attest, critical scholars of world politics have developed conceptual vocabularies with which to (re-)construct, from various analytical-political perspectives, aspects of these governance/resistance relations. My task in this article is to argue that – under historical circumstances of capitalist modernity – a dialectical understanding of class-based powers is necessary, if by no means sufficient, for understanding social powers more generally, and issues of global governance and resistance which implicate those powers. Although it is not without its tensions and limitations, I have found re-envisionings of Marxian political theory inspired by Western Marxism – and in particular by interpretations of Antonio Gramsci – to be enabling for such a project. Marxian theory provides critical leverage for understanding the structures and dynamics of capitalism, its integral if complex relationship to the modern form of state, the class-based powers it enables and the resistances these engender; and Gramsci's rich if eternally inchoate legacy suggests a conceptual vocabulary for a transformative politics in which a variety of anti-capitalist movements might coalesce in order to produce any number of future possible worlds whose very possibility is occluded by capitalism. In the present context of globalising capitalism and neo-imperialism, such resistance has taken the form of a transnational confluence of movements for global justice and peace.