Global economic integration is one of the most powerful forces shaping the contemporary international system, sparking convergence in business and law as well as society and culture. It also challenges established principles of the international order. This volume analyses changing patterns of authority in the global political economy with an in-depth look at the new roles played by state and non-state actors, and addresses substantive themes such as the provision of global public goods, new modes of regulation and the potential of new institutions for global governance. An international cast of contributors introduce four analytical categories that act as guidelines for a more systematic enquiry into authority beyond the state today: demand, supply, effect and design. Critically, this book moves beyond the state-centric views of authority relations and introduces a broader conceptualization more suited to understanding the realities of global politics and public international law in the 21st century.