-24 Figure 2:‘Heavy-light, absent-present’ In other words, what contributes to the prevention of violence the most, are not heavy security measures but a dynamic concept of security and quality of life in prison. The quality of life in a prison is particularly influenced by the following factors: • Safety, decency and fairness within the prison • The type of regime and conditions of imprisonment • The possibility to maintain contact with family and engage in personal development • Good relationships between prisoners and prison staff. Only if prisoners and staff feel safe and prisoners feel treated decently and fairly, can good staff-prisoner relationships be established that are of capital importance for initiating trust and support as well as for maintaining a stable equilibrium in the prison. • Good working conditions for staff • Drug control and health care, including special care for groups with special needs and those in a situation of vulnerability • A positive and rehabilitative prison culture