 All dominion was founded on natural reason, shared even by non-Christians. “Government is the channel through which the natural power of the commonwealth is exercised” (Costello 1974: 49). Therefore, if a government misuses its power by trying to exercise a dominium proprietatis over its citizen, that is, treating them like slaves, there is a right to resist. This also holds for a king, notwithstanding that, for Molina, monarchy was the best form of government (Molina-DII II, 23.10). While this resistance has to be supported by the common will of the citizens in the case of abuse of power by a legitimate ruler, every citizen has the right to kill an illegitimate usurper of power (Molina-DII III, 6.2).