“Why does non-state political violence occur and under what circumstances might it be justified."
A synthesis form what Grimm wrote in his paper ‘The State Monopoly of Force’, tells us much about the genesis, justification and limitations of this important concept. State’s monopoly on the use of force reflects public law and the need to regulate ‘the relationship between the state and individuals as well as private associations’ but this requires legitimacy drawn from the support of the people. Legal State authority (gewalt), sovereign power and public authority provide the State with the right to exercise control over others (protestas). The entitlement to use force was always intrinsic in the protection of common interests, because ‘everyone was entitled to see to their rights, if needed be by force of arms’. Monopoly evolved from the principle of the right of the individual to protect his/her property, such as ownership of the land (patria protestas).