Meticulously researched and beautifully written, Fit to Be Citizens? demonstrates how both science and public health shaped the meaning of race in the early twentieth century. Through a careful examination of the experiences of Mexican, Japanese, and Chinese immigrants in Los Angeles, Natalia Molina illustrates the many ways local health officials used complexly constructed concerns about public health to demean, diminish, discipline, and ultimately define racial groups. She shows how the racialization of Mexican Americans was not simply a matter of legal exclusion or labor...