We hold many assumptions about police work-that it is the responsibility of the state, or that police officers are given the right to kill in the name of public safety or self-defense. But in The Killing Consensus, Graham Denyer Willis shows how in S£o Paulo, Brazil, killing and the arbitration of “normal€ killing in the name of social order are actually conducted by two groups-the police and organized crime-both operating according to parallel logics of murder. Based on three years of ethnographic fieldwork, Willis's book traces how homicide detectives categorize two types of killing: the first resulting from “resistance€ to police arrest (which is often broadly defined) and the second at the hands of a crime "family' known as the Primeiro Comando da Capital (PCC). Death at the hands of police happens regularly, while the PCC€s centralized control and strict moral code among criminals has also routinized killing, ironically making the city feel safer for most residents. In a fractured urban security environment, where killing mirrors patterns of inequitable urbanization and historical exclusion along class, gender, and racial lines, Denyer Willis's research finds that the city€s cyclical periods of peace and violence can best be understood through an unspoken but mutually observed consensus on the right to kill. This consensus hinges on common notions and street-level practices of who can die, where, how, and by whom, revealing an empirically distinct configuration of authority that Denyer Willis calls sovereignty by consensus.