Communism is a form of organized crime justified by the [worldview] of Marxism–Leninism. It is basically a combination of criminal inclination coupled with uncontrolled political power. Like all crime, communism is parasitic. It produces nothing of value itself; it must rely on force, propaganda, torture, intimidation, threats, and espionage to survive. Like cancer, communism consumes its host. Except that in communism’s case, it will only die when the whole planet is consumed. Must we let things get to that point?

Communism is the corruption of a dream of justice.

Communism is evil. Its driving forces are the deadly sins of envy and hatred.

Communism is the final logic of the dehumanization of man.

Communism is the doctrine of the conditions of the liberation of the proletariat.

Communism teaches and seeks two objectives: Unrelenting class warfare and absolute extermination of private ownership. Not secretly or by hidden methods does it do this, but publicly, openly, and by employing every and all means, even the most violent. To achieve these objectives there is nothing which it does not dare, nothing for which it has respect or reverence; and when it has come to power, it is incredible and portentlike in its cruelty and inhumanity. The horrible slaughter and destruction through which it has laid waste vast regions of eastern Europe and Asia are the evidence; how much an enemy and how openly hostile it is to Holy Church and to God Himself is, alas, too well proved by facts and fully known to all. Although We, therefore, deem it superfluous to warn upright and faithful children of the Church regarding the impious and iniquitous character of Communism, yet We cannot without deep sorrow contemplate the heedlessness of those who apparently make light of these impending dangers, and with sluggish inertia allow the widespread propagation of doctrine which seeks by violence and slaughter to destroy society altogether. All the more gravely to be condemned is the folly of those who neglect to remove or change the conditions that inflame the minds of peoples, and pave the way for the overthrow and destruction of society.

Communism, in a word, is the organization of millions of people into a whole, according to community laws. This naturally implies the establishment of many things that did not exist in the previous non-communist society, or in society of another type. The pre-existing community elements, the beginnings of communism, are transformed in the newly created conditions, sometimes so radically that they no longer seem to have any connection with their former manifestations. Hence the erroneous impression that communist-type relations are absolutely new. p. 14-16

Communism is a hateful thing and a menace to peace and organized government; but the communism of combined wealth and capital, the outgrowth of overweening cupidity and selfishness, which insidiously undermines the justice and integrity of free institutions, is not less dangerous than the communism of oppressed poverty and toil, which, exasperated by injustice and discontent, attacks with wild disorder the citadel of rule.

Communism… is the genuine resolution of the antagonism between man and nature and between man and man; it is the true resolution of the conflict between existence and essence, objectification and self-affirmation, freedom and necessity, individual and species. It is the riddle of history solved and knows itself as the solution.

Communism is for us not a state of affairs which is to be established, an ideal to which reality [will] have to adjust itself. We call communism the real movement which abolishes the present state of things. The conditions of this movement result from the premises now in existence.

Communism is a hateful thing and a menace to peace and organized government; but the communism of combined wealth and capital, the outgrowth of overweening cupidity and selfishness, which insidiously undermines the justice and integrity of free institutions, is not less dangerous than the communism of oppressed poverty and toil, which, exasperated by injustice and discontent, attacks with wild disorder the citadel of rule. He mocks the people who proposes that the Government shall protect the rich and that they in turn will care for the laboring poor. Any intermediary between the people and their Government or the least delegation of the care and protection the Government owes to the humblest citizen in the land makes the boast of free institutions a glittering delusion and the pretended boon of American citizenship a shameless imposition.

Communism is like an autoimmune disorder; it doesn't do the killing itself, but it weakens the system so much that the victim is left helpless and unable to fight off anything else.

First, Communism is based on a materialistic and humanistic view of life and history. According to Communist theory, matter, not mind or spirit, speaks the last word in the universe. Such a philosophy is avowedly secularistic and atheistic. Under it, God is merely a figment of the imagination, religion is a product of fear and ignorance, and the church is an invention of the rulers to control the masses. Moreover, Communism, like humanism, thrives on the grand illusion that man, unaided by any divine power, can save himself and usher in a new society.... Cold atheism wrapped in the garments of materialism, Communism provides no place for God or Christ.

The trouble with Communism is that it has neither a theology nor a Christology; therefore it emerges with a mixed-up anthropology. Confused about God, it is also confused about man. In spite of its glowing talk about the welfare of the masses, Communism's methods and philosophy strip man of his dignity and worth, leaving him as little more than a depersonalized cog in the ever-turning wheel of the state.