Between 1820 and 1990, the share of world income going to today's wealthy nations soared from twenty percent to almost seventy. Since then, that share has plummeted to where it was in 1900. As Richard Baldwin explains, this reversal of fortune reflects a new age of globalization that is drastically different from the old. In the 1800s, globalization leaped forward when steam power and international peace lowered the costs of moving goods across borders....