This paper includes essential history of how the multilateral world has evolved over the last 150 years, followed by an examination of several types of multilateral systems: the United Nations and related organizations (including the World Bank group and the International Monetary Fund), and the World Trade Organization; regional organizations; and cross-cutting multilateral or plurilateral groupings with more limited, generally consultative purposes, such as the Group of Seven and BRICS (Brazil, Russia, India and China). It concludes with some reflections on the implications for multilateralism of a defection from its attractions and principles by key actors.
