The Dicastery for the Doctrine of the Faith unveiled a newly approved text on marriage, it did so with a disarming simplicity: the mystery of two lives becoming one. Yet behind that biblical intuition lies a complex cultural moment that the Holy See considers too critical to ignore. The document, titled “Una caro (one flesh). In Praise of Monogamy,” was endorsed by Pope Leo XIV on November 21 and later presented to the press, marking a deliberate intervention in the global conversation on love, commitment, and the human desire for belonging.
The Note proposes a vision of monogamy rooted not in rule-making but in anthropology. Marriage, it states, is built on an unbreakable exclusivity, the kind that turns two people into a single story without dissolving their individual identities. In an era fascinated by limitless autonomy and ever-expanding relational models, the text argues for the enduring value of a love that chooses one person—and continues choosing them across time.
Cardinal Víctor Manuel Fernández, prefect of the Dicastery, outlines three motivations behind the document. First is the technological ethos shaping contemporary culture, a worldview that risks convincing individuals that boundaries are simply obstacles and that relationships can be endlessly customized. Second is an honest dialogue with African bishops, who have insisted that the continent’s cultures, commonly associated with polygamous traditions, in fact contain profound testimonies favouring monogamous union. Third is the Western rise of polyamory, no longer hidden but increasingly promoted as a public alternative to traditional partnership. Against this backdrop, the Note offers a counterproposal: the beauty of unity. Drawing from Christian theology, it connects the marital bond to the love between Christ and the Church, not as an abstract metaphor but as a source of strength for daily fidelity. Though primarily addressed to bishops, the Dicastery hopes the text will also serve engaged couples, young adults navigating relational complexity, and spouses seeking depth in their commitment.
