Despite the Mexican government's projected image of prosperity and modernity in the years following World War II, workers who felt that Mexico's progress had come at their expense became increasingly discontented. From 1948 to 1958, unelected and often corrupt officials of STFRM, the railroad workers' union, collaborated with the ruling Institutionalized Revolutionary Party (PRI) to freeze wages for the rank and file. In response, members of STFRM...