Incarceration is expensive, rehabilitation is not  Many of the rehabilitation and intervention schemes made available in prison are replicated in community settings by social services and charities. The cost of delivering these programmes in prison originates from the concept of prison itself. The expense of building, equipping, staffing and monitoring a prison vastly outweighs the cost of rehabilitative activities. Research conducted by Steve Aos has shown that rehabilitative programs designed to reduce crime can be cost-effective [i] .  Prisons should be used only where the imperative to protect society from criminal behaviour cannot be met by the imperative to rehabilitate. A minority of offenders will be incorrigibly violent and uncontrollable, but under the status quo, these dangerous offenders not represent the majority of the prison population (see statistics above).  The yearly cost of incarcerating a young offender in the UK is now £140,000, almost three times the annual fee charged by an elite public school [ii] . Diverting this money to intervention programmes delivered to families, in homes and in schools would avoid the harms of incarceration (described above), while retaining the benefit of rehabilitation. The focus should therefore be prevention and early intervention rather than punishment.  [i] Aos, S., The Comparative Costs and Benefits of Programs to Reduce Crime, Washington State Institute for Public Policy, May 2001,   [ii] “Punishing Costs” The New Economics Foundation, 2010, p18