Homicide was a frequent occurrence in medieval England. Indeed, violence was regarded as an acceptable, and often necessary, part of life. These are the conclusions reached by the author in his study of homicide patterns in London, Bristol, and five English counties from 1202 to 1276. Using quantitative methods, the author analyzes murder as a social relationship that can tell us much about medieval life and its social organization, much that would otherwise remain unknown. Given investigates murder rates, violent conflicts between family members, masters, servants, and neighbors, and the collaboration between these same groups in assaulting others. He also explores the socio-economic status of killers and victims, the treatment of killers in court, including what attitudes toward violence can be gleaned from judicial verdicts, the effects of urbanization of patterns of homicide, and social factors that impeded or encouraged recourse to violence.