The research purpose of this book is to advance the reform of the existing international monetary system through the establishment of a new international currency standard that is a super-sovereign currency. International Monetary System provides international economic activities rules for the human society. It has significant influences not only on international economic activities of various countries but also on their domestic economic activities as well. Since the disintegration of International gold standard in 1971, studies on reform of international monetary system have remained as the important research themes for international economic research fields. Improvements of international monetary system to facilitate worldwide economic developments have been interests to all. Thus this book has valuable theoretical contributions.    Since the collapse of Bretton Woods System, the current international monetary system of Jamaica Systemhas come into being. Under Jamaica System, the sovereign currency US dollar has acted as the main international currency. This has caused vulnerability of money standard, instability of exchange rate system, and frequent occurrences of currency crises. Calls for international monetary system reforms have increased under these circumstances. Various programs such as improved international gold standard system, expansion of Special Drawing Rights, as well as establishment of single world currency surface. So this book has significant practical contributions as well. The major contribution of this book is the proposal of new scheme of establishment of supra-sovereign international currency. This is an entire new reform program that differs significantly from any past or current reform programs in international economic research fields from all over the world.