very January, political leaders from all over the world gather in a Swiss mountain valley. At the World Economic Forum in Davos, the assembled politicians agree to set aside their differences and to speak a common language. Closeted together in a ski resort, they restate their commitment to a single, global economy. They mingle cheerfully with the same multinational executives and investment bankers. They campaign to attract foreign investment and trade. For five days, the world’s leaders seem to agree on a narrative about how the world works. At Davos, even the most intractable political...