From poets to sociologists, many people who write about life on the U.S.-Mexico border use terms such as "border crossing" and "hybridity" which suggest that a unified culture—neither Mexican nor American, but an amalgamation of both—has arisen in the borderlands. But talking to people who actually live on either side of the border reveals no single commonly shared sense of identity, as Pablo Vila demonstrated in his book Crossing Borders, Reinforcing Borders: Social Categories, Metaphors, and Narrative Identities on the U.S.-Mexico Frontier. Instead, people living near the border, like people everywhere, base their sense of identity on a constellation of interacting factors that includes regional identity, but also nationality, ethnicity, and race.

In this book, Vila continues the exploration of identities he began in Crossing Borders, Reinforcing Borders by looking at how religion, gender, and class also affect people's identifications of self and "others" among Mexican nationals, Mexican immigrants, Mexican Americans, Anglos, and African Americans in the Cuidad Juárez-El Paso area. Among the many fascinating issues he raises are how the perception that "all Mexicans are Catholic" affects Mexican Protestants and Pentecostals; how the discourse about proper gender roles may feed the violence against women that has made Juárez the "women's murder capital of the world"; and why class consciousness is paradoxically absent in a region with great disparities of wealth. His research underscores the complexity of the process of social identification and confirms that the idealized notion of "hybridity" is only partially adequate to define people's identity on the U.S.-Mexico border.

Along the U.S.-Mexico frontier, where border crossings are a daily occurrence for many people, reinforcing borders is also a common activity. Not only does the U.S. Border Patrol strive to "hold the line" against illegal immigrants, but many residents on both sides of the border seek to define and bound themselves apart from groups they perceive as "others."

This pathfinding ethnography charts the social categories, metaphors, and narratives that inhabitants of El Paso and Ciudad Juárez use to define their group identity and distinguish themselves from "others." Pablo Vila draws on over 200 group interviews with more than 900 area residents to describe how Mexican nationals, Mexican immigrants, Mexican Americans, African Americans, and Anglos make sense of themselves and perceive their differences from others.

This research uncovers the regionalism by which many northern Mexicans construct their sense of identity, the nationalism that often divides Mexican Americans from Mexican nationals, and the role of ethnicity in setting boundaries among Anglos, Mexicans, and African Americans. Vila also looks at how gender, age, religion, and class intertwine with these factors. He concludes with fascinating excerpts from re-interviews with several informants, who modified their views of other groups when confronted by the author with the narrative character of their identities.