In the twentieth century, the factory stood at the center of American life. Entire towns sprouted around them. Thanks to union-won wages, factory workers and their families could attain middle-class security. When I was writing a book about autoworkers, I kept hearing nostalgic stories of the way things used to be: however down on your luck you were, there was always a job waiting for you at the factory.

After decades of companies offshoring manufacturing employment, the factory is no longer...