Frankfurt critical theorists have had much to say in the last two decades about globalization. Yet Brian Milstein's creative new book takes many of the debates at hand to new and higher intellectual levels. Offering creative rereadings of Kant and many other important cosmopolitan theorists, Milstein treads where many contemporary critical theorists have feared to tread: the harsh realities of our violence-prone international or interstate political system. This is an important contribution to international political and social theory.

- William E. Scheuerman, Professor of Political Science and International Studies, Indiana University,

In his original and important contribution to the debate about cosmopolitanism, Brian Milstein uses Kant’s concept of “commercium” to reconstruct the many ways in which we already live in a globalized world. But one, as Milstein shows with great clarity, in which we have not yet found the legal and political forms for organizing this life in a justifiable way. This book shows the power of a critical theory that combines normative and sociological reflection. A great achievement.

- Rainer Forst, Professor of Political Theory and Philosophy, Goethe Universität, Frankfurt,