This book presents the first critical analysis of Carl Schmitt's "The Nomos of the Earth" and how it relates to the epochal changes in the international system that have risen from the collapse of the 'Westphalian' international order. There is an emerging recognition in political theory circles that core issues, such as order, social justice, rights, need to be studied in their global context. Schmitt's international political thought provides a stepping stone in these related paths, offering an alternative history of international relations, of the genesis, achievements and demise of the 'Westphalian system.' Writing at a time when he believed that the spatial, political and legal order - the nomos of the earth - had collapsed, he highlighted the advent of the modern state as the vehicle of secularization, tracing how this interstate order was able to limit and 'rationalize and humanize' war. Providing a large number of case studies including: global terrorism, humanitarian intervention and US hegemony, this book will give further impetus to, and expand, the nascent debate on the significance of Schmitt's legal and political thought for international politics. "The International Political Thought of Carl Schmitt" will be of interest to students and scholars of international relations, law and history.