33 In view of this organized common effort towards peaceful living, Catholic doctrine vindicates to the State the dignity and authority of a vigilant and provident defender of those divine and human rights on which the Sacred Scriptures and the Fathers of the Church insist so often. It is not true that all have equal rights in civil society. It is not true that there exists no lawful social hierarchy. Let it suffice to refer to the Encyclicals of Leo XIII already cited, especially to that on State powers, and to the other on the Christian Constitution of States. In these documents the Catholic will find the principles of reason and the Faith clearly explained, and these principles will enable him to defend himself against the errors and perils of a Communistic conception of the State. The enslavement of man despoiled of his rights, the denial of the transcendental origin of the State and its authority, the horrible abuse of public power in the service of a collectivistic terrorism, are the very contrary of all that corresponds with natural ethics and the will of the Creator. Both man and civil society derive their origin from the Creator, Who has mutually ordained them one to the other. Hence neither can be exempted from their correlative obligations, nor deny or diminish each other's rights. The Creator Himself has regulated this mutual relationship in its fundamental lines, and it is by an unjust usurpation that Communism arrogates to itself the right to enforce, in place of the divine law based on the immutable principles of truth and charity, a partisan political program which derives from the arbitrary human will and is replete with hate.
Source: Divini Redemptoris (Vatican.va)