In 1833, Chicago was a wilderness outpost of just 350 residents, clumped around a small military fort on soggy land where the Chicago River trickled into Lake Michigan. The site was known to local natives as Chigagou, or the “wild garlic place.” By the end of the century, this desolate swamp had been transformed into a modern metropolis of 1.7 million, known the world over for its dense web of railroads, cruelly efficient slaughterhouses, fiery blast furnaces, and soaring skyscrapers.

Chicago’s …