“American manufactures spent the better part of three decades unwinding its stock of process knowledge when it opened so many factories in China. Every US factory closure represents a likely permanent loss of production skill and knowledge. Line workers, machinists, and product designers are thrown out of work; then their suppliers and technical advisers struggle as well. Entire American communities of engineering practice have dissolved, leaving behind a region known as the Rust belt. But they were continuously scorned by economists and executives, who sought low-wage production in the name of globalization. Still today, many American economists doubt there is anything special about manufacturing and put their faith in the inevitable march to a service economy.”