This article is in many ways a pragmatist critique of pragmatism in IR, focusing on what practices scholars have mainly engaged in by drawing upon pragmatism and how to resolve problems that arise in considering them. Numerous scholars of international relations have drawn upon pragmatism to examine issues of interest to the field, largely (though not exclusively) of an epistemological or methodological nature, focusing mainly on pragmatism as a philosophy of science. Often overlooked, however, is that pragmatism is not just a philosophy of science but a distinctive and in some respects quite radical school of metaphysics, and it implies a particularly flexible form of social ontology. I thus argue for broader horizons in pragmatist theory in IR. I criticise the overly epistemological or methodological focus of the existing ways many IR scholars have used pragmatism, and discuss of how pragmatist social theory fits within existing scholarship in the field. Finally, I suggest how pragmatist social theory can contribute to ongoing IR research programmes by dissolving the dualisms of agent and structure, realism and idealism, and normative and strategic action. In other words, as a fairly coherent set of principles, pragmatism offers the foundations for a new movement in the study of international politics-indeed, such a movement has already begun, and I suggest that its horizons are particularly broad.