Thomas's theory of political order became highly influential. He sees man as a social being that lives in a community and interacts with its other members. That leads, among other things, to the division of labour.
Thomas made a distinction between a good man and a good citizen, which was important to the development of libertarian theory. That is, the sphere of individual autonomy was one which the state could not interfere with.
Thomas thinks that monarchy is the best form of government, because a monarch does not have to form compromises with other persons. Moreover, according to Thomas, oligarchy degenerates more easily into tyranny than monarchy. To prevent a king from becoming a tyrant, his political powers must be curbed. Unless an agreement of all persons involved can be reached, a tyrant must be tolerated, as otherwise the political situation could deteriorate into anarchy, which would be even worse than tyranny. In his political threaty De Regno, Aquinas subordinated the political power of king to the primate of the divine and human law of God the creator. For example, he affirmed:
According to Thomas, monarchs are God's representatives in their territories, but the church, represented by the popes, is above the kings in matters of doctrine and ethics As a consequence, worldly rulers are obliged to adapt their laws to the Catholic Church's doctrines and determinations.