David Ricardo’s concept of comparative advantage has not been disproven; it has just been ignored for the past 200 years. While there has been progress toward untethered competition in the post-war period, American labor unions became most vocal against trade agreements during the Obama Administration. The opposition expanded even as real median incomes grew, with the rise of China cited as the watershed that broke the free trade movement. But where is the future?  The increased opposition to imports has seen a concurrent rise in the self-sufficiency mantra. Just to name a couple of examples, Mexico has now allocated $1 billion toward promoting products produced with native corn, and China is focused on raising domestic yields an...