In the late nineteenth and early twentieth centuries, coal mining was the most important industry in Colorado. Coal mines served as the crucibles of empire, churning out the fuel needed to power the railroads, precious-metal mines, and smelters that…

On November 21, 1927, members of a Colorado militia fired into a crowd of hundreds of striking miners in the Weld County town of Serene, killing six and wounding twenty. The Columbine Massacre showed that little had changed in Colorado in terms of…

The Industrial Workers of the World (IWW) was founded in Chicago in 1905 as an explicitly anarchist-socialist alternative to the major labor unions of the time, which the IWW’s leaders deemed too conservative. In the following decades, the organization…