While the United States has long imported oil and other raw materials from the third world, we used to import manufactured goods mainly from other rich countries like Canada, European nations and Japan.
But recently we crossed an important watershed: we now import more manufactured goods from the third world than from other advanced economies. That is, a majority of our industrial trade is now with countries that are much poorer than we are and that pay their workers much lower wages.
For the world economy as a whole — and especially for poorer nations — growing trade between high-wage and low-wage countries is a very good thing. Above all, it offers backward economies their best hope of moving up the income ladder.
But for American workers the story is much less positive. In fact, it’s hard to avoid the conclusion that growing U.S. trade with third world countries reduces the real wages of many and perhaps most workers in this country. And that reality makes the politics of trade very difficult.