Why does the Church oppose birth control?

In 1968, Pope Paul VI issued his landmark encyclical letter Humanae Vitae (Latin, “Human Life”), which reemphasized the Church’s constant teaching that it is always intrinsically wrong to use contraception to prevent new human beings from coming into existence.

The Historic Christian Teaching
Few realize that up until 1930, all Protestant denominations agreed with the Catholic Church’s teaching condemning contraception as sinful. At its 1930 Lambeth Conference, the Anglican church, swayed by growing social pressure, announced that contraception would be allowed in some circumstances. Soon the Anglican church completely caved in, allowing contraception across the board. Since then, all other Protestant denominations have followed suit. Today, the Catholic Church alone proclaims the historic Christian position on contraception.

Evidence that contraception is in conflict with God’s laws comes from a variety of sources:

Nature
Contraception is wrong because it’s a deliberate violation of the design God built into the human race, often referred to as “natural law.” The natural-law purpose of sex is procreation. The pleasure that sexual intercourse provides is an additional blessing from God, intended to offer the possibility of new life while strengthening the bond of intimacy, respect, and love between husband and wife. The loving environment this bond creates is the perfect setting for nurturing children.

But sexual pleasure within marriage becomes unnatural, and even harmful to the spouses, when it is used in a way that deliberately excludes the basic purpose of sex, which is procreation. God’s gift of the sex act, along with its pleasure and intimacy, must not be abused by deliberately frustrating its natural end—procreation.

Scripture
Is contraception a modern invention? Hardly! Birth control has been around for millennia. Scrolls found in Egypt, dating to 1900 B.C., describe ancient methods of birth control that were later practiced in the Roman empire during the apostolic age. 

The biblical penalty for not giving your brother’s widow children was public humiliation, not death (Deut. 25:7–10). But Onan received death as punishment for his crime (Gen. 38:8–10). This means his crime was more than simply not fulfilling the duty of a brother-in-law. He lost his life because he violated natural law, as Jewish and Christian commentators have always understood. For this reason, certain forms of contraception have historically been known as “Onanism,” after the man who practiced it, just as homosexuality has historically been known as “Sodomy,” after the men of Sodom, who practiced that vice (see Gen. 19).

Apostolic Tradition
The biblical teaching that birth control is wrong is found even more explicitly among the Church Fathers, who recognized the biblical and natural law principles underlying the condemnation. In A.D. 195, Clement of Alexandria wrote, “Because of its divine institution for the propagation of man, the seed is not to be vainly ejaculated, nor is it to be damaged, nor is it to be wasted” (The Instructor of Children 2:10:91:2).

The Magisterium
The Church also, fulfilling the role given it by Christ as the identifier and interpreter of apostolic Scripture and apostolic tradition, has constantly condemned contraception as gravely sinful. In Humanae Vitae, Pope Paul VI stated, “[W]e must once again declare that the direct interruption of the generative process already begun, and, above all, directly willed and procured abortion, even if for therapeutic reasons, are to be absolutely excluded as licit means of regulating birth. Equally to be excluded, as the teaching authority of the Church has frequently declared, is direct sterilization, whether perpetual or temporary, whether of the man or of the woman. Similarly excluded is every action which, either in anticipation of the conjugal act, or in its accomplishment, or in the development of its natural consequences, proposes, whether as an end or as a means, to render procreation impossible” (HV 14).

This was reiterated in the Catechism of the Catholic Church: “[E]very action which, whether in anticipation of the conjugal act, or in its accomplishment, or in the development of its natural consequences, proposes, whether as an end or as a means, to render procreation impossible is intrinsically evil” (CCC 2370). “Legitimate intentions on the part of the spouses do not justify recourse to morally unacceptable means . . . for example, direct sterilization or contraception” (CCC 2399).

The Church also has affirmed that the illicitness of contraception is an infallible doctrine: “The Church has always taught the intrinsic evil of contraception, that is, of every marital act intentionally rendered unfruitful. This teaching is to be held as definitive and irreformable. Contraception is gravely opposed to marital chastity, it is contrary to the good of the transmission of life (the procreative.aspect of matrimony), and to the reciprocal self-giving of the spouses (the unitive.aspect of matrimony); it harms true love and denies the sovereign role of God in the transmission of human life” (Vademecum for Confessors 2:4, Feb. 12, 1997).

Human Experience
Pope Paul VI predicted grave consequences that would arise from the widespread and unrestrained use of contraception. He warned, “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 artificially limiting the increase of children. 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” (HV 17).

No one can doubt the fulfillment of these prophetic words. They have all been more than fulfilled in this country as a result of the widespread availability of contraceptives, the “free love” movement that started in the 1960s, and the loose sexual morality that it spawned and that continues to pervade Western culture.

Indeed, recent studies reveal a far greater divorce rate in marriages in which contraception is regularly practiced than in those marriages where it is not. Experience, natural law, Scripture, Tradition, and the magisterium, all testify to the moral evil of contraception.

(Source: Catholic Answers)
Read more in the “Why Do We Do That?” series from Deacon Mike Fritz.