Position · 50

Traditional Marriage Ethic

The view that marriage is a lifelong covenant between one man and one woman, and that sexual relations belong only within it.

History

Roots

The ethic rests on a handful of texts that its holders read as a single line of teaching. Genesis presents humanity as created “male and female” and joined as “one flesh” (Genesis 1:27–28, Genesis 2:24). When Jesus was asked about divorce, he went back to those two verses and concluded, “What therefore God has joined together, let not man separate” (Matthew 19:3–9). Paul treated marriage as the setting for sexual union and as a picture of Christ and the church (1 Corinthians 7:1–9, Ephesians 5:31–32), and listed sexual immorality, adultery and same-sex intercourse among the sins of those who will not inherit the kingdom (1 Corinthians 6:9–11, Romans 1:26–27). Hebrews sums up the norm: “Let marriage be held in honor among all, and let the marriage bed be undefiled” (Hebrews 13:4).

The Early Church set this ethic against Greco-Roman practice, which tolerated divorce, concubinage, exposure of infants and sex between men and boys. The Didache (late first or early second century) lists “you shall not commit adultery, you shall not commit pederasty, you shall not commit fornication” side by side (ch. 2). Justin Martyr’s First Apology (c. 155) cited Jesus’ words on lust and divorce as proof of Christian chastity (ch. 15), and Athenagoras told the emperor that Christians married “only for the purpose of having children” (A Plea for the Christians, ch. 33, c. 177).

Formation

Augustine gave the ethic its classic theological shape. Writing in the wake of the Jovinian controversy over marriage and virginity, he defended marriage as a real good in On the Good of Marriage (c. 401). He located that good in offspring, faithfulness and, among Christians, “the sanctity of the Sacrament,” which made the bond unbreakable while both spouses lived (§32). This threefold scheme of proles, fides, sacramentum ran through medieval theology. Thomas Aquinas grounded the norm in natural law, arguing that sex is ordered by nature to procreation within a stable union.

The Latin West came to count marriage among the seven Sacraments, and the Council of Trent defined in 1563 that the bond cannot be dissolved even for adultery (Session 24, canons 5 and 7). The Reformation kept the core norm but changed its frame. Martin Luther denied that marriage was a sacrament and treated it as a holy “estate” of creation, governed by civil law; he and John Calvin both rejected compulsory clerical celibacy and allowed divorce for adultery. The Westminster Confession (1646) states the Protestant version: marriage “is to be between one man and one woman,” and only adultery or “wilful desertion” can dissolve it (ch. 24.1, 24.5–6). The East kept marriage as a mystery but, by “economy,” allowed a second and third marriage after divorce or widowhood, with a penitential rite.

Causes of the modern dispute

For most of Christian history the ethic was assumed rather than defended. It became a live question in the twentieth century in three stages. Contraception came first: the 1930 Lambeth Conference cautiously allowed it, and Paul VI’s Humanae Vitae (1968) answered by reaffirming the “inseparable connection … between the unitive significance and the procreative significance” of the marriage act (§12). No-fault divorce laws in the 1960s and 70s followed. Finally, gay rights movements and then civil same-sex marriage, legal in the Netherlands from 2001 and across the United States after Obergefell v. Hodges (2015), forced every church to say whether it would bless such unions.

Influence

The ethic is still the official teaching of the Roman Catholic, Eastern Orthodox and Oriental Orthodox churches and of most Evangelical, Baptist and Pentecostal bodies. Mainline Protestant families have divided over it. The Anglican Communion’s Lambeth Conference 1998 passed Resolution I.10, which rejected “homosexual practice as incompatible with Scripture” and declined to advise blessing same-sex unions (summary, secondary). When the Episcopal Church consecrated Gene Robinson, a partnered gay man, as bishop in 2003, conservative provinces formed GAFCON, whose Jerusalem Declaration (2008) affirmed “the unchangeable standard of Christian marriage between one man and one woman.” Among Methodist churches the dispute ended in the United Methodist Split: after the 2019 special General Conference tightened the rules and the 2024 conference removed them, thousands of congregations left, many for the Global Methodist Church formed in 2022 to keep the traditional standard (summary, secondary). Several Lutheran and Reformed denominations in North America and Europe changed their teaching in the 2000s and 2010s, while their partner churches in Africa and Asia mostly did not.

Key ideas and contributors

Creation sets the pattern. The ethic’s main argument is not a list of prohibitions but a positive account of marriage drawn from Genesis 1–2. Male and female are made for each other, the “one flesh” union can only be formed by a man and a woman, and Jesus’ appeal to “the beginning” in Matthew 19 shows the pattern still binds. Each negative rule (against adultery, fornication, same-sex acts, divorce) follows from that one positive picture.

Marriage has goods built into it. Following Augustine, Catholic teaching names the goods of marriage as the unity of the spouses and the procreation and raising of children. The Second Vatican Council described marriage as an “intimate partnership of married life and love” rooted “in the conjugal covenant of irrevocable personal consent” (Gaudium et Spes §48). The Catechism calls homosexual acts “intrinsically disordered” because “they close the sexual act to the gift of life,” while insisting that people with same-sex attraction “must be accepted with respect, compassion, and sensitivity” and are called to chastity (§§2357–2359).

The body has meaning. John Paul II’s Wednesday audiences from 1979 to 1984, later collected as the “theology of the body,” argued that the body’s sexual difference is a language of self-gift that only marriage speaks truthfully (first audience, 5 September 1979; overview, secondary). His exhortation Familiaris Consortio (1981) applied this to family life.

Marriage is a sign of Christ and the church. Protestant defenders tend to lead with Ephesians 5. If marriage is a living picture of Christ’s covenant with his people, then its permanence, exclusivity and sexual difference are part of what it signifies. The Nashville Statement (2017), issued by the Council on Biblical Manhood and Womanhood, put it this way: marriage is “a covenantal, sexual, procreative, lifelong union of one man and one woman … meant to signify the covenant love between Christ and his bride the church” (art. 1).

The Orthodox emphasis. Orthodox churches stress marriage as a mystery that joins two people for salvation. The Holy and Great Council of Crete (2016) taught that the Church “does not allow for her members to contract same-sex unions or any other form of cohabitation apart from marriage” (The Sacrament of Marriage and its Impediments).

The biblical case restated. Robert Gagnon’s The Bible and Homosexual Practice (2001) became the standard scholarly defence of the traditional reading of the prohibition texts. Richard Hays’s The Moral Vision of the New Testament (1996) gave a widely cited, more pastoral version, concluding that the New Testament consistently treats same-sex intercourse as outside God’s design.

Key controversies

What the texts were about. The sharpest challenge comes from Affirming Theology. John Boswell’s Christianity, Social Tolerance, and Homosexuality (1980) argued that early Christianity was less hostile to same-sex love than later centuries made it. James Brownson’s Bible, Gender, Sexuality (2013) and Matthew Vines’s God and the Gay Christian (2014) argued that the prohibition texts address exploitation, idolatry or excess, not faithful, committed same-sex partnerships, which ancient writers did not have in view. Traditional scholars reply that Romans 1 grounds its judgment in creation rather than in particular abuses, and that ancient sources did know of lasting same-sex relationships. Gagnon’s book is the fullest version of that reply.

Does “one flesh” require sexual difference? Affirming writers read Genesis 2 as being about kinship and companionship, so that its logic can extend to two men or two women. Traditionalists hold that Jesus’ pairing of Genesis 1:27 (“male and female”) with Genesis 2:24 makes sexual difference part of the definition.

Procreation. If marriage is ordered to children, critics ask, why does every church marry infertile and elderly couples? Catholic natural law thinkers answer that such unions are still the kind of act that is ordered to life. Many Protestants give procreation less weight and rely on the creation pattern and the Christ–church sign instead. The dispute over contraception, settled one way in Humanae Vitae and the other way by most Protestant churches after 1930, is the background to this argument.

Divorce and consistency. Critics note that churches holding the traditional line on same-sex marriage often tolerate divorce and remarriage, which Jesus addressed far more directly (Matthew 5:31–32). Traditions also disagree among themselves: Catholics allow no remarriage after a valid sacramental marriage, the Orthodox allow it by economy, and most Protestants allow it after adultery or desertion (1 Corinthians 7:15). Pope Francis’s Amoris Laetitia (2016) opened a cautious path to communion for some divorced and remarried Catholics (ch. 8), and four cardinals publicly asked him to clarify whether this changed doctrine.

Pastoral practice and blessing. Some churches now keep the doctrine while changing the practice around it. The Dicastery for the Doctrine of the Faith’s Fiducia Supplicans (2023) allowed brief, non-liturgical blessings of couples in irregular situations, including same-sex couples, while stating that Catholic teaching on marriage was unchanged. African bishops’ conferences largely declined to apply it (summary, secondary). The Church of England’s bishops took a similar route with the “Prayers of Love and Faith” commended in 2023 after the Living in Love and Faith process (Church of England). Traditionalists in both churches argue that a blessing cannot be separated from approval of what it blesses; progressives argue the changes do not go far enough.

Harm and celibacy. Critics argue that requiring lifelong celibacy of gay Christians who do not feel called to it causes real psychological harm. Traditionalists answer that celibacy is the same call made to every unmarried Christian, and point to celibate gay Christians such as Wesley Hill, whose Washed and Waiting (2010) describes that life from the inside.

The global church. The dispute increasingly runs along North–South lines. Growing churches in Africa and Asia overwhelmingly hold the traditional ethic, and the votes at Lambeth 1998 and the 2019 Methodist General Conference were carried in large part by delegates from the global South. Western progressives have described this as cultural conservatism; Southern leaders have described Western revisions as cultural captivity.

What remains unresolved

Both sides agree that the Bible’s explicit texts say no to the same-sex acts their authors knew about. The disagreement is over whether those texts, and the creation pattern behind them, settle the question for committed same-sex partnerships today, or whether they leave it open as slavery or women’s roles were later reopened. Underneath sits an older dispute about how Scripture binds and who interprets it, which is why the argument tends to split churches along the same lines as earlier fights over authority.