1968
"Pope Paul VI, in a prophetic way, warned all what would happen if these unlawful birth control methods were used. He said there would be a lowering of moral standards and marital infidelity. In addition, he mentioned that young people would be tempted easily to break the moral law. Paul VI also said women would become mere objects for men’s satisfaction. Abortion, divorce rates (50 - 60 %), teen pregnancies, prostitution, etc., all show the accuracy of Paul VI’s predictions. "
From Humanae Vitae:
http://www.ewtn.com/library/ENCYC/P6HUMANA.HTM
17. Upright men can even better convince themselves of the solid grounds on which the teaching of the Church in this field is based, if they care to reflect upon the consequences of methods of artificial birth control. Let them consider, first of all, how wide and easy a road would thus be opened up towards conjugal infidelity and the general lowering of morality. Not much experience is needed in order to know human weakness, and to understand that men—especially the young, who are so vulnerable on this point—have need of encouragement to be faithful to the moral law, so that they must not be offered some easy means of eluding its observance. It is also to be feared that the man, growing used to the employment of anti-conceptive practices, may finally lose respect for the woman and, no longer caring for her physical and psychological equilibrium, may come to the point of considering her as a mere instrument of selfish enjoyment, and no longer as his respected and beloved companion.
Let it be considered also that a dangerous weapon would thus be placed in the hands of those public authorities who take no heed of moral exigencies. Who could blame a government for applying to the solution of the problems of the community those means acknowledged to be licit for married couples in the solution of a family problem? Who will stop rulers from favoring, from even imposing upon their peoples, if they were to consider it necessary, the method of contraception which they judge to be most efficacious? In such a way men, wishing to avoid individual, family, or social difficulties encountered in the observance of the divine law, would reach the point of placing at the mercy of the intervention of public authorities the most personal and most reserved sector of conjugal intimacy.
Consequently, if the mission of generating life is not to be exposed to the arbitrary will of men, one must necessarily recognize insurmountable limits to the possibility of man's domination over his own body and its functions; limits which no man, whether a private individual or one invested with authority, may licitly surpass. And such limits cannot be determined otherwise than by the respect due to the integrity of the human organism and its functions, according to the principles recalled earlier, and also according to the correct understanding of the "principle of totality" illustrated by our predecessor Pope Pius XII.[21]
18. It can be foreseen that this teaching will perhaps not be easily received by all: Too numerous are those voices—amplified by the modern means of propaganda—which are contrary to the voice of the Church. To tell the truth, the Church is not surprised to be made, like her divine Founder, a "sign of contradiction",[22] yet she does not because of this cease to proclaim with humble firmness the entire moral law, both natural and evangelical. Of such laws the Church was not the author, nor consequently can she be their arbiter; she is only their depositary and their interpreter, without ever being able to declare to be licit that which is not so by reason of its intimate and unchangeable opposition to the true good of man.
In defending conjugal morals in their integral wholeness, the Church knows that she contributes towards the establishment of a truly human civilization; she engages man not to abdicate from his own responsibility in order to rely on technical means; by that very fact she defends the dignity of man and wife. Faithful to both the teaching and the example of the Savior, she shows herself to be the sincere and disinterested friend of men, whom she wishes to help, even during their earthly sojourn, "to share as sons in the life of the living God, the Father of all men."[23]
ABC is involvement in the culture of death. Satan has blinded you people. Repent. For the kingdom of God is at hand.