The aim of this article is to contribute to the elaboration of a deliberative approach to global institutional design. A deliberative approach aims to embed processes of mutual reason-giving at the heart of international relations and global decision-making. The theoretical framework that orientates this discussion is the liberal approach to international law developed by John Rawls. It may seem strange to invoke this model: after all, Rawls does not specifically discuss the issue of global institutional design and indeed has been (...) widely criticized for neglecting this topic. In fact, in its account of global public reason, Rawls's approach can be shown to contain important and surprisingly neglected resources for constructing a dynamic and inclusive theory of global deliberative politics. (shrink)