The Great Horse Flu: Thomas Andrews on the “Great Epizootic of 1872”, and the Fate of Reconstruction America

In September 1872, in the countryside north of Toronto, horses began to fall ill. Their noses ran, they coughed, and their breathing became “labored and severe.” In the worst cases, the sufferers could do nothing other than stand in their stalls “as if benumbed and paralyzed.” Eventually, an increasing number of them began to die.

Within days of the illness being identified, it was spreading throughout the new Canadian Confederation. By mid-October it had invaded New England and upstate New York; by late October it had nearly ended traffic on the Erie Canal. In early November it reached New York City and Boston. Eventually, it would spread through nearly every corner of North America and into parts of the Southern Hemisphere.

Thomas G. Andrews is professor of history and faculty director of the Center of the American West at the University of Colorado Boulder. His research and teaching encompass environmental, animal, Indigenous, labor, and western American history.

He is the author of Killing for Coal: America’s Deadliest Labor War, winner of the Bancroft Prize and the George Perkins Marsh Prize, and Coyote Valley: Deep History in the High Rockies. His latest book reconstructs the extraordinary equine influenza outbreak of 1872–73 and uses it to reconsider capitalism, urbanization, animal labor, Reconstruction, and the Panic of 1873.