Every inmate in the four facilities was given an opportunity to complete a lengthy questionnaire that covered such details as age, ethnic group, and previous custodial history; feelings of safety within the facility; personal experience of victimization in the past month; whether incidents were reported to prison staff; and views about the prevalence of bullying and how it could be prevented. The response rate was high--92 percent of young offenders and 97 percent of adult offenders filled out questionnaires. Interviews were also conducted with both victims and victimizers and with prison staff. Study findings are detailed in terms of the nature and social context of victimization and bullying, individual inmate responses to bullying, inmate views of prison staff responses, and the prevention of victimization and bullying. Findings show how predatory inmates use bullying and other forms of victimization to establish, maintain, and exploit their domination of other inmates. 50 tables and 38 tables