What happens when an institution built on universal moral authority finds itself compelled to speak in the language of a specific political moment, about a specific political actor? And, in terms that leave very little room for the diplomatic ambiguity that has historically been the Vatican’s most valuable tool. Pope Leo XIV has arrived at precisely that moment.

The evolution of Leo XIV’s public posture has been gradual but unmistakable. In the early months of his pontificate, the first American pope took conspicuous care to maintain a certain indirection when addressing the political realities of his home country, speaking of suffering and injustice in terms broad enough to avoid the appearance of partisan engagement. That caution has given way to something considerably more pointed.

The choice to use the phrase “off-ramp,” a term drawn directly from the vocabulary of American political and military discourse, was not accidental. It signals a pope who is not merely offering spiritual reflection on the abstract evil of war but who is attempting to communicate in the operational register of the people he is trying to reach, a pope who understands the Washington conversation well enough to borrow its idiom. That fluency is both a strength and a complication, because speaking the language of a political culture also means accepting the risks that come with being understood within it.

The Vatican’s capacity to serve as a credible intermediary in international conflicts has always rested on what Italian diplomatic tradition calls “terzietà,” a kind of structural impartiality, a positioning above and apart from the alignments of power politics that allows the Holy See to maintain open channels with actors who regard each other as enemies. This positioning is not passivity. It is a carefully maintained posture that enables the Vatican to perform functions that no state and few international organizations can replicate, as the quiet but consequential role played by the Holy See in brokering dialogue between the United States and Cuba in 2014 demonstrated. The value of that posture depends on its consistency. A pope who speaks to all parties as a universal pastor, whose moral authority derives precisely from the fact that he does not serve the interests of any particular nation or alliance, is a pope to whom belligerents can send signals without appearing to concede anything to their adversaries.

The question that Leo XIV’s recent interventions raise, and that Vatican observers are now debating with some urgency, is whether that positioning can survive the kind of explicit, named criticism he has directed at Trump. Francesco Sisci, the sinologist and director of the Appia Institute, has argued that the Pope’s fundamental obligation is to speak to eight billion people, not to any subset of them, and that taking sides in any war risks collapsing the distinction between moral authority and political alignment, opening a door to forms of sacred endorsement of conflict that the papacy has spent centuries trying to close. On this reading, the Pope’s role is not to choose between Washington and Tehran but to maintain the kind of impartiality that allows him to engage with both, and it is precisely that impartiality that makes the engagement worth having.

Sisci’s framework is analytically coherent, but it runs into a difficulty that is not merely theoretical. The Iran war is not a symmetrical conflict between two comparable parties whose claims the Vatican can weigh with equal detachment. It is a war launched by the world’s most powerful military alliance against a regional power, a war that has already killed more than a thousand people in Iran, displaced millions across Lebanon, produced what human rights organizations have documented as potential war crimes at an elementary school in Minab, and triggered an energy crisis whose consequences are now falling most heavily on the poorest economies in the world. In conditions of radical asymmetry, the posture of impartiality carries its own moral weight, because to appear equidistant between the powerful and the powerless is to implicitly legitimize the position of the powerful. Leo XIV, an American who grew up in a country now conducting this war, appears to have concluded that a careful neutrality that says nothing specific to anyone will not serve either the people dying in Iran or the institution he leads.

The diplomatic costs of that conclusion are real, however, and they are accumulating. Relations between the Holy See and the current White House were already strained before the Iran war, over immigration policy and other matters of principle on which the two institutions occupy very different ground. The space for constructive private dialogue that might translate public moral pressure into concrete diplomatic outcomes has narrowed considerably. In the weakened multilateral environment that characterizes the current international system, where the United Nations has demonstrated its impotence in the face of conflicts driven by great-power vetoes and bilateral military commitments, effective mediation requires not only moral authority but also access to the rooms where decisions are actually being made. The Vatican has the former in abundance. Its access to the latter, in Washington’s case, is severely constrained.