Between the 1960s and 1990s, the police power in Los Angeles intensified. Police power was not incidental or supplemental, but constitutive of postwar city politics and authority. The introduction outlines the central question of the book: how and why this could happen after the Watts uprising of 1965 exposed the racism at the heart of the police power, decades of pressure from an active anti–police abuse movement, and under the twenty-year rule of a liberal administration that sought to control and regulate police behavior. Tracing the racism at the heart of the police power reveals the historical consequences of expanded police authority. Relying on the police to manage social problems of crime, violence, and drugs led to disciplinary practices of surveillance, harassment, and arrest that criminalized and excluded African American and Latino/a residents. In the process, as antipolice activists pointed out and struggled against, the police often deemed residents of color as not only potential threats to the public welfare but also unfit for full benefits of social membership in American society. Police practices thereby produced racialized definitions of criminality and enforced the city’s hierarchical racial order. As a result, the struggle over policing structured and exacerbated deep cleavages in American cities over race, citizenship, politics, and state power.