Considerable attention has recently been directed towards the analysis of pluralism in social science, not least in economics. Plurality is often taken as a mark of pluralism. But it is not the same thing, and often indicates little more than a disconnected fragmentation of contributions to a topic. We believe, in fact, that such fragmentation is rife in modern social theorising, and identify numerous causes. We subsequently examine the possibility of using an ontologically reflexive form of pluralism to achieve a greater degree of theoretical integration between various strands of thought than has hitherto been the case. We conclude by stressing the need to be aware of ontological presuppositions in social theorising. Our motivation is a concern with advancing a 'the pluralist project' in which, where feasible, an integration of ideas takes centre stage.