The notion of "reflexivity" has been so intimately tied to the critique of Positivism and Empiricism inIR that the emergence of post-Positivism has naturally produced the anticipation of a "reflexive turn"in IR theory. Three decades after the launch of the post-positivist critique, however, reflexive IR hasfailed to impose itself as either a clear or serious contender to mainstream scholarship. Reasons for thisfailure include the proliferation of different understandings of "reflexivity" in IR theory that entailsignificantly different projects and concerns for IR scholarship; the equation of "reflexive theory" with"critical" and "emancipatory theory" and the consequent confusion of ethical/normative issues withstrictly epistemic/theoretical ones; and the refusal to consider reflexive IR as a "research programme"concerned with empirical knowledge, not just meta-explanation. The development of reflexivity in IR theory as a sustainable cognitive and praxeological effort is nonetheless possible-and still needed.This paper suggests what taking the "reflexive turn" would really entail for IR Introduction: In his 1989 article on the 'Third Debate' in International Relations (IR), Yosef Lapid (1989:249-50) noted, after Mervyn Frost (1986:11), that '[f]or many years the international relations discipline ha[d] had the dubious honour of being among the least self-reflexive of the Western social sciences.' This diagnosis was shared by many scholars who thought it necessary to start reflecting on the epistemic and theoretical premises that subtended the discipline's predominant narratives on world politics. The critique of Positivist (American) IR scholarship has therefore naturally produced the anticipation of a 'reflexive turn' (Neufeld 1991) in IR, and in the early 1990s the view ! 1 was that 'the prospects for the development of theoretically reflexive international relations theory [were] real and significant, while the need for such theory [was] urgent' (Neufeld 1991:2). With the emergence and development of a sustained and coherent metatheoretical critique of Positivist IR, "reflexivity" has, indeed, gained a substantive