THE Group of Twenty, or G20, is an international forum made up of leaders from nations and international organizations that is now the epicenter of world governance. As its name implies, the G20 is formally composed of 19 nations plus the European Union, but it also includes “permanent” invitees such as the heads of the International Monetary Fund, the World Bank, the Secretary-General of the United Nations, plus the chairs of organizations like the African Union and the Association of Southeast Asian Nations. The countries that make up the G20 account for 90 percent of the world GDP, 80 percent of world trade, and, with countries like China and India as members, two thirds of the world’s population. Along with the annual fall session at the United Nations, the annual meeting of the G20 is the most important gathering of leaders in the world. This year’s G20 meeting was held for the first time in Osaka, Japan, from June 28 to 29, 2019.