Prison Of Peace works in order to reduce violence and promote peaceful conflict resolution among incarcerated people. By resolving conflicts as peacemakers and mediators and by teaching those skills to their peers, Prison of Peace participants create durable and sustainable programs in their institutions. For this reason, Prison of Peace requires all of the initial participants in each prison to be serving life or long-term sentences, with preference given to those serving sentences of life without parole. They also equip them with the skills to change their environment and pass those skills on to others. Once a cadre of at least 6 trainers (usually inmates serving life or long-term sentences) is certified, Prison of Peace is considered sustainable in that institution.