Much of what defined the nation as it grew into a superpower was produced in Chicago. Before air travel overtook trains, nearly every coast-to coast journey included a stop there, and this flow of people and commodities made it America's central clearinghouse, laboratory, and factory. And even as Chicago led the way in creating mass-market culture, its artists pushed back in their own distinct voices. Chicago native Thomas Dyja re-creates the story of the city in its postwar prime and explains its profound impact on modern America.