Una Caro (meaning One Body) is a catechetical document published by the Dicastery for the Doctrine of the Faith. It was approved by Pope Leo XIV on 21 November 2025 and promulgated on 25 November 2025. The full title of the document is “A Catechetical Document on the Value of Marriage as a Distinguished Unity and Mutual Belonging, Praising Monogamy.”
Purpose and Background
According to Cardinal VĂctor Manuel Fernández, Prefect of the Dicastery, three major factors motivated the publication of this document. These are: the global technological environment that encourages human beings to perceive themselves as limitless; the need to address African cultural understandings of polygamy; and the growth of non-monogamous relationships in Western societies. The document seeks to present monogamy not as a restriction, but rather as an opportunity to love infinitely.
Structure and Content
The document is divided into seven chapters. It draws insights from a wide range of sources, including Sacred Scripture, Church history, theology, and poetry. Quotations from writers such as Walt Whitman, Pablo Neruda, and Emily Dickinson are also included. Grounding its reflection on monogamy in the biblical foundation of the Book of Genesis, the document studies marriage in the light of the teachings of the Church Fathers, ecclesial magisterium, and contemporary theological thought.
Principal Theological Themes
The document highlights two fundamental elements: mutual belonging and conjugal love. Mutual belonging, established through the free consent of the spouses, reflects Trinitarian communion and contributes to the stability of the marital bond. While this belonging is deeply intimate, it also respects the dignity and freedom of each person. The document strongly condemns every form of domination, violence, and psychological control that undermines this mutual respect. Conjugal love is presented as a unifying power and as a divine gift. Through marital love, sexuality is understood as God’s gift, oriented toward self-giving and the good of the spouse.
Social and Educational Dimensions
The document addresses contemporary challenges such as the increase in divorce, fragile marital relationships, the trivialization of adultery, and the promotion of polygamy. It also points out the paradox of modern times, in which marital relationships break down even as cultural narratives continue to exalt love as something noble. In response, the Dicastery emphasizes the need for an educational approach that develops a “new pedagogy,” helping today’s youth to understand love not merely as an emotion, but as responsibility and fidelity. The document further reminds married couples of the importance of not living in isolation, but of engaging together in shared social and communal activities.
Audience and Pastoral Application
Although the document is addressed primarily to bishops, its broader aim is to help married couples and young people to understand the richness of Christian marriage. Monogamy is presented as an essential element of marriage, closely connected with exclusive union and mutual partnership. By linking monogamy with the unitive purpose of sexuality and mutual belonging, the document firmly affirms it as an indispensable dimension of the marital vocation.
Rev. Dr. Augustine Chennattu
