No visitor to Mexico can fail to recognize the omnipresence of street vendors, selling products ranging from fruits and vegetables to prepared food and clothes. The vendors compose a large part of the informal economy, which altogether represents at least 30 percent of Mexico's economically active population. Neither taxed nor monitored by the government, the informal sector is the fastest growing economic sector in the world. In Street Democracy Sandra C. Mendiola Garcia explores the political lives and economic significance of this otherwise overlooked population, focusing on the radical street vendors during the 1970s and 1980s in Puebla, Mexico's fourth-largest city. She shows how the Popular Union of Street Vendors challenged the ruling party's ability to control unions and local authorities' power to regulate the use of public space. Since vendors could not strike or stop production like workers in the formal economy, they devised innovative and alternative strategies to protect their right to make a living in public spaces. By examining the political activism and historical relationship of street vendors to the ruling Institutional Revolutionary Party (PRI), Mendiola Garcia offers insights into grassroots organizing, the Mexican Dirty War, and the politics of urban renewal, issues that remain at the core of street vendors' experience even today.