In 1905, Mexican journalist Ricardo Flores Magón escaped the Porfiriato dictatorship and settled in St. Louis, where he launched the newspaper Regeneración. With 20,000 readers throughout Mexico and the U.S., the leftist publication raised awareness of growing wealth inequality, labor exploitation and political corruption in both countries. Historian Francisco Perez shares how Flores Magón connected the struggles of the American working class with that of the Mexican working class, how St. Louis' labor movement shaped Flores Magón’s worldview, and why, more than a century later, the activist’s politics still resonate.