Virtually every major international gathering of world leaders recently has ended in failure—or at least failure to reach enough agreement to issue a concluding statement or communique. These failures come at a time when many have been looking for signs that world leaders would come together to address the most pressing problems facing the world—including climate change, the breakdown in the rules of the international trading system, the need everywhere for good jobs that pay a living wage, and rapidly growing income inequality. The failure of these meetings to produce formal agreements—or even specific paths to reaching agreements in the future—despite the high stakes has left many questioning the ability of the world’s leaders to meet glo...