Gaudium et Spes §74

⁷⁴ Men, families and the various groups which make up the civil community are aware that they cannot achieve a truly human life by their own unaided efforts. They see the need for a wider community, within which each one makes his specific contribution every day toward an ever broader realization of the common good. For this purpose they set up a political community according to various forms. The political community exists, consequently, for the sake of the common good, in which it finds its full justification and significance, and the source of its inherent legitimacy. Indeed, the common good embraces the sum of those conditions of the social life whereby men, families and associations more adequately and readily may attain their own perfection. Yet the people who come together in the political community are many and diverse, and they have every right to prefer divergent solutions. If the political community is not to be torn apart while everyone follows his own opinion, there must be an authority to direct the energies of all citizens toward the common good, not in a mechanical or despotic fashion, but by acting above all as a moral force which appeals to each one's freedom and sense of responsibility. It is clear, therefore, that the political community and public authority are founded on human nature and hence belong to the order designed by God, even though the choice of a political regime and the appointment of rulers are left to the free will of citizens. It follows also that political authority, both in the community as such and in the representative bodies of the state, must always be exercised within the limits of the moral order and directed toward the common good—with a dynamic concept of that good—according to the juridical order legitimately established or due to be established. When authority is so exercised, citizens are bound in conscience to obey. Accordingly, the responsibility, dignity and importance of leaders are indeed clear. But where citizens are oppressed by a public authority overstepping its competence, they should not protest against those things which are objectively required for the common good; but it is legitimate for them to defend their own rights and the rights of their fellow citizens against the abuse of this authority, while keeping within those limits drawn by the natural law and the Gospels. According to the character of different peoples and their historic development, the political community can, however, adopt a variety of concrete solutions in its structures and the organization of public authority. For the benefit of the whole human family, these solutions must always contribute to the formation of a type of man who will be cultivated, peace-loving and well-disposed towards all his fellow men.