AD> Claudia Roesch offers a study of Mexican American families and evolving notions of masculinity and motherhood in the context of American family history. The book focuses both on the negotiation of family norms in social expert studies and on measures taken by social workers and civil-rights activists for families. The work fills gaps in research regarding the history of the American family in the 20th century, the history of Mexican Americans, and the history of social sciences. Taking a long-term perspective from the first wave of Mexican mass immigration in the 1910s and 1920s until the new social movements of the 1970s, the study takes into account influences of the Americanization and eugenics movements, modernization theory, psychoanalysis, and the Chicano civil-rights movement. Thus, Claudia Roesch offers important new findings on the nexus between the scientization of social work and changing family values in the age of modernity.