Undermining Race rewrites the history of race, immigration, and labor in the copper industry in Arizona. The book focuses on the case of Italian immigrants in their relationships with Anglo, Mexican, and Spanish miners (and at times with blacks, Asian Americans, and Native Americans), requiring a reinterpretation of the way race was formed and figured across place and time.

Phylis Martinelli argues that the case of Italians in Arizona provides insight into “in between” racial and ethnic categories, demonstrating that the categorizing of Italians varied from camp to camp depending on local conditions—such as management practices in structuring labor markets and workers’ housing, and the choices made by immigrants in forging communities of language and mutual support. Italians—even light-skinned northern Italians—were not considered completely “white” in Arizona at this historical moment, yet neither were they consistently racialized as non-white, and tactics used to control them ranged from micro to macro level violence.

To make her argument, Martinelli looks closely at two “white camps” in Globe and Bisbee and at the Mexican camp of Clifton-Morenci. Comparing and contrasting the placement of Italians in these three camps shows how the usual binary system of race relations became complicated, which in turn affected the existing race-based labor hierarchy, especially during strikes. The book provides additional case studies to argue that the biracial stratification system in the United States was in fact triracial at times. According to Martinelli, this system determined the nature of the associations among laborers as well as the way Americans came to construct “whiteness.”

Joining the U.S.’ war effort in 1942, Mexican President Manuel Ávila Camacho ordered the dislocation of Japanese Mexican communities and approved the creation of internment camps and zones of confinement. Under this relocation program, a new pro-American nationalism developed in Mexico that scripted Japanese Mexicans as an internal racial enemy. In spite of the broad resistance presented by the communities wherein they were valued members, Japanese Mexicans lost their freedom, property, and lives.

In Uprooting Community, Selfa A. Chew examines the lived experience of Japanese Mexicans in the U.S.-Mexico borderlands during World War II. Studying the collaboration of Latin American nation-states with the U.S. government, Chew illuminates the efforts to detain, deport, and confine Japanese residents and Japanese-descent citizens of Latin American countries during World War II. These narratives challenge the notion that Japanese Mexicans enjoyed the protection of the Mexican government during the war and refute the mistaken idea that Japanese immigrants and their descendants were not subjected to internment in Mexico during this period. Through her research, Chew provides evidence that, despite the principles of racial democracy espoused by the Mexican elite, Japanese Mexicans were in fact victims of racial prejudice bolstered by the political alliances between the United States and Mexico.

The treatment of the ethnic Japanese in Mexico was even harsher than what Japanese immigrants and their children in the United States endured during the war, according to Chew. She argues that the number of persons affected during World War II extended beyond the first-generation Japanese immigrants “handled” by the Mexican government during this period, noting instead that the entire multiethnic social fabric of the borderlands was reconfigured by the absence of Japanese Mexicans.