This chapter serves as an introduction to the book as a whole. The book aims to make a modest but important contribution to normative political philosophy drawing on the works of Hobbes and Kant, both of whom wrote their original contributions at times of warfare and political upheaval. Similarly, this work is in part a philosophical response to the conflict that has broken out again in Europe in the Russia/Ukraine war and in the ongoing violence in the Middle East which has plumbed new depths in the past two years. The central question of the book is introduced: how can such conflagrations involving extensive violence in pursuit of territorial annexation be avoided and definitively ended? The answer to be developed in detail in the volume is that the contemporary geopolitical order built around the principle of sovereignty of nation states has not despite the best efforts of international law and of the UN brought peace but rather what today more resembles a Hobbesian war of all against all. Hence, just as in Hobbes argument of the need for a sovereign authority to end the war of all against all, what the world needs today is a supranational World Authority with real powers of enforcement in those areas of policy competence that may be assigned to it (and of which the primordial competence would be arbitration and settlement of disputes among states). While such an arrangement would represent a radical political institutional innovation at world level, a model of this type already exists in the European Union. The chapter includes some reflections on why there has been such a recrudescence of violent conflicts in recent years linking absolutist claims of national sovereignty for states with the analogous absolutist claims for pursuit of self interest to be found in anarcho-capitalist writings. The chapter concludes with a summary of the main arguments of the book: Part I which outlines the central normative arguments for a supranational World Authority by the principal authors (O’Sullivan, Ngau and Ricci, Chaps. 1 – 9 ); and Part II which consists of independent expert insights in relation to the proposals of the book from a number of different perspectives written by independent authors (Chaps. 10 – 13 ).