“Rethinking Binationalism” explores the history of binational Mexican labor activism in the early 20th century. The perspective is from a segment of the grass roots base of an under-explored part of the Industrial Workers of the World and highlights Mexican activists who were committed members of the binational Partido Liberal Mexicano (PLM) and, simultaneously, organized Mexicans into the IWW. In this period, as others, Mexican worker/organizers were often the engines for binational solidarity. This binationalism had deep roots in the area north of the post 1848 border. The lives and work of two traveling organizer-propagandists suggests binational (and internationalist) cross generational legacies of a commitment to labor organizing and social change which resonates in the present period.