Catholic Social Teaching and Birthright Citizenship

A Reflection on the USCCB Amicus Brief in Trump v. Barbara

by Robert Nalewajek

The amicus brief may be found here

Catholic Social Teaching Refutes False Choices

CAPP-USA appreciates the United States Conference of Catholic Bishops’ advocacy on behalf of vulnerable migrants and their children. The bishops’ amicus brief in Trump v. Barbara reflects the Church’s deep pastoral concern for human dignity. The brief’s commitment to the protection of the child, the unity of the family, and the welcome owed to the stranger represents the genuine heart of Catholic social teaching.

As the United States affiliate of the Fondazione Centesimus Annus Pro Pontifice—a Vatican foundation established by Pope St. John Paul II in 1993, operating under the authority of the Holy See—CAPP-USA’s mission is to promote the knowledge and practice of Catholic Social Teaching in fidelity to the Magisterium. We offer the following in that spirit as a companion resource.

The constraints of an amicus brief—a legal document shaped by the requirements of constitutional argument—naturally limit the theological development that any single filing can undertake. We offer this reflection to ground the brief the fullest possible account of the teachings and tradition we share.

Catholic Social Teaching is most powerful—and most credible in the public square—when it refuses false choices. An integral account of that teaching ultimately provides the most durable foundation for the pastoral goals the bishops rightly pursue.

1. Strengthening the Argument’s Foundation

The brief’s invocation of human dignity—rooted in the imago Dei, affirmed across the Catechism of the Catholic Church, 1700, Gaudium et Spes, 12, 22, and the recent declaration Dignitas Infinita—is entirely correct and deeply welcome. Every child born on American soil possesses inviolable dignity, regardless of the circumstances of birth or the legal status of parents. On this there can be no ambiguity.

The tradition’s teaching on dignity is, however, strengthened rather than weakened when its ontological character is precisely affirmed. Human dignity is God-given, inalienable, and infinite: it precedes, transcends, and survives any legal, political, or social determination. It is not conferred by the state through citizenship, nor is it diminished by the absence of it. As the Catechism makes clear, basic human rights—to life, sustenance, shelter, and family unity—are prior to the state and independent of legal status. Certain civic rights, by contrast, may legitimately be associated with membership in a particular political community.

Because dignity is ontological—grounded in the creative act of God—its claims on the conscience of legislators and jurists are absolute and unconditional.

This distinction, far from undermining the brief’s concern for migrant children, actually deepens it. If dignity were dependent on a particular citizenship regime, its defense would always be vulnerable to jurisdictional challenge. The most compelling argument for humane treatment of every child born in the United States does not rest on the mechanism of jus soli; it rests on the prior and indestructible fact of that child’s humanity.

A fully integral account of the tradition affirms that while birthright citizenship may serve important goods in the American legal context, the Church’s moral concern for migrant children and families extends beyond and beneath any single legal framework. This framing makes the bishops’ case more universal and more resilient: it cannot be answered by pointing to the many nations—including longstanding Catholic-majority countries—that maintain human dignity and uphold immigrant welfare through jus sanguinis or hybrid citizenship systems.

2. Deploying the Principle of Subsidiarity in Its Full Depth

The brief’s appeal to subsidiarity reflects a genuine insight: that the social belonging of a child born and raised within a community creates a real, morally significant bond that ought not be lightly disregarded by higher political authorities. This is an authentically Catholic intuition, rooted in the principle’s concern for the integrity of human community at every level of social life.

The full depth of subsidiarity, however, encompasses a complementary truth. As Pope Benedict XVI emphasized in Caritas in Veritate, subsidiarity governs the proper allocation of authority and responsibility across all levels of society—safeguarding not only lower-level communities from unjust absorption by higher powers, but also protecting the legitimate sphere of political communities to govern matters properly within their competence. The determination of membership criteria in a political community, including the rules by which citizenship is acquired, has historically been understood in CST and political philosophy as falling within the proper authority of the nation-state, to be exercised in service to the common good.

An integral deployment of subsidiarity does not resolve the legal question of birthright citizenship in either direction. It insists, rather, that whatever rules a political community adopts for membership must be oriented toward the common good, must respect the inherent dignity of all persons, and must be exercised with justice and charity toward the vulnerable. This framing is both more precise and more persuasive: it engages the legitimate concerns of those who hold that sovereign communities possess real authority over membership, while insisting that such authority is never unlimited and must always be exercised in a manner worthy of human dignity.

3. Mercy and Justice as Companions

The bishops’ brief is animated by mercy—by a compassionate concern for children and families who face genuine hardship and uncertainty. Mercy is a cardinal virtue of the Christian life, and the pastoral urgency that drives the brief is admirable and authentic.

Catholic Social Teaching, however, consistently presents mercy and justice not as competitors but as companions. As Pope Benedict XVI teaches in Caritas in Veritate, authentic social action must be grounded in truth: without this grounding, even well-intentioned advocacy risks serving partial interests rather than the integral common good. An account of migration policy that attends only to the claims of those in irregular status, without equally attending to the legitimate interests of law-abiding citizens and of migrants who patiently pursue lawful pathways, risks presenting a vision of mercy detached from justice.

The Catechism of the Catholic Church, 2241 articulates the reciprocal character of the moral relationship between immigrants and receiving nations — a two-way bond of welcome and civic obligation.

The Catechism of the Catholic Church, 2241 itself makes this reciprocity explicit: prosperous nations are called to welcome those in genuine need; immigrants, in turn, are obliged to respect the laws of their host countries and to contribute to civic life. This reciprocity is not a concession to inhospitality; it is the condition of a truly ordered welcome—one that can be sustained over time and that serves the common good of all parties.

A morally compelling case for humane treatment of migrant families is strengthened when it openly acknowledges the legitimate goods that just laws and orderly processes serve. Such an account demonstrates that the Church’s advocacy is genuinely ordered toward a common good that includes the well-being of citizens and immigrants alike.

4. Solidarity is the Fullness of a Mutual Bond

St. John Paul II’s articulation of solidarity as “a firm and persevering determination to commit oneself to the common good; that is to say, to the good of all and of each individual” (Sollicitudo Rei Socialis, 38) remains one of the most luminous expressions of the social dimension of the Gospel. The brief’s appeal to solidarity on behalf of vulnerable migrant families is well-grounded in this tradition.

The full depth of John Paul’s vision, however, presents solidarity as a bond of mutual obligation—a web of interdependence that encompasses not only the host society’s duty of welcome, but also the immigrant’s corresponding responsibilities of integration, respect for law, and contribution to shared civic life. When solidarity is presented in its full bilateral character, the case for immigrant inclusion is actually deepened: it is grounded not in unilateral entitlement but in the dignity of a shared humanity that generates duties on all sides.

CST also calls for moral discernment in the evaluation of different migration situations. Those fleeing genuine persecution, life-threatening violence, or extreme deprivation carry an urgent claim on the solidarity of receiving nations—a claim the Church has consistently and emphatically affirmed. Those migrating primarily in pursuit of economic opportunity, while fully deserving of humane treatment and orderly pathways, present a morally distinct situation. Honoring these distinctions does not diminish the Church’s welcome; it ensures that those with the most urgent claims receive the most urgent attention, and that the principle of solidarity retains its full moral weight.

5. Conflating “Extreme Necessity” with “Economic Preference”

The brief draws, implicitly, on the Thomistic tradition of necessity—the moral teaching, articulated in the Summa Theologica (II-II, q. 66, a. 7), that in cases of dire need, actions otherwise prohibited may be morally justified as a matter of natural equity. Applied to migration, this principle has real and important force: those fleeing imminent threats to life or fundamental human welfare have a compelling moral claim that transcends ordinary juridical categories.

The principle’s power, however, derives precisely from its precision. St. Thomas and the tradition apply this exception narrowly, to situations of genuine extremity—not to the full range of circumstances that may motivate migration. An argument that extends the logic of necessity to encompass all unauthorized presence, regardless of the gravity of the circumstances that prompted it, risks diluting the principle to the point where it loses its distinctive moral force.

A more precise application—reserving the language of necessity for those in genuine peril—concentrates moral urgency where it is most warranted, and builds a case that is harder to dismiss.

A more precise application, one that reserves the language of necessity for those in genuine peril while affirming the human dignity and lawful entitlements of all migrants, is both more faithful to the tradition and more effective as advocacy. It concentrates moral urgency where it is most warranted, and it builds a case that is harder to dismiss as a universal exemption from legal order.

6. Embracing the “Yes/And”

The genius of Catholic Social Teaching is its refusal of false choices. Gaudium et Spes, 26, defines the common good as “the sum total of social conditions which allow people, either as groups or as individuals, to reach their fulfillment more fully and more ”easily”—a definition that is at once universal in scope and particular in application, encompassing the good of all humanity and the good of specific political communities.

Applied to migration, CST proposes a demanding but fruitful “Yes/And”: yes to the fundamental right of persons to migrate in search of security and a dignified life, and yes to the sovereign nation’s legitimate authority—and responsibility—to regulate membership and borders in service to its own common good. These are not competing principles to be traded off against each other; they are complementary dimensions of a single integral vision. This is, indeed, the framework CAPP-USA has consistently applied in its own analyses of immigration policy—a framework the USCCB itself articulated in Strangers No Longer.

The most enduring contribution the Church can make to the ongoing debate about immigration policy in the United States is not the advocacy of any single legal mechanism, but the insistence on this integral vision—on the dignity of every person, the legitimate authority of political communities, the reciprocal character of solidarity, the indispensable role of just law, and the common good of both those who arrive and those who receive them.

Birthright citizenship may well serve important goods in the American context; the bishops are right to defend it. But the tradition’s concern for the migrant child and family is wider and deeper than any single policy, and it is precisely this wider and deeper concern that gives the Church’s voice its unique moral authority in this debate. An advocacy grounded in the fullness of CST cannot ultimately be answered by pointing to policy alternatives, because it does not depend on any particular policy. It depends on the indestructible dignity of the human person—which the state can fail to protect, but can never, in the end, take away.

7. Conclusion

CAPP-USA is confident that the bishops share the conviction that the fullest defense of the migrant child and family is one that holds together, in a genuine “Yes/And,” the universal dignity of every person and the ordered governance that allows communities to sustain welcome over time. We offer this reflection in that spirit—not as a dissent from the bishops’ pastoral concern, but as an invitation to ground that concern in the fullest possible account of the tradition we share.

Catholic Social Teaching has never offered simple answers to complex questions of migration and membership. Its power lies precisely in its refusal of false choices—its insistence on holding human dignity and ordered governance, universal solidarity and particular common good, mercy and justice, together in a demanding but fruitful tension. We trust that this fuller vision, far from weakening the bishops’ concern for the vulnerable, ultimately provides it with the most durable theological foundation.

It is in that spirit of fraternal dialogue, and in our shared commitment to the integral flourishing of every human person, that CAPP-USA offers this reflection to the Church and to the broader public conversation.