The school-aged population of the United States has become more racially and ethnically diverse in recent decades, but its public schools have become significantly less integrated. In California, nearly half of the state's Latino youth attend intensely-segregated minority schools. Apart from shifts in law and educational policy at the federal level, this gradual resegregation is propelled in part by grassroots efforts led predominantly by white, middle-class residential communities that campaign to reorganize districts and establish ethnically separate neighborhood schools. Despite...