Pope Leo XIV used his return flight from France to mount his most direct challenge yet to the US-Silicon Valley consensus that AI safety concerns are overblown. Asked specifically about what the US and China should do to prevent catastrophic AI risks, the pope said expert warnings should be "taken seriously" and are not "fake news, as some have said" — a pointed rebuttal to Donald Trump, who has called AI-going-rogue concerns a "hoax." The pope also took a swipe at Nvidia CEO Jensen Huang, who told CBS News this month that he agreed with Trump that safety worries were overblown. Leo noted that Huang had announced the possibility of inserting guardrails into certain AI models, then added with visible scepticism: "He's the same one, however, that says there should be no limits placed and no government regulation." It was a precise identification of the rhetorical two-step that chipmakers and model builders have been running — volunteering optional technical safeguards while lobbying against binding regulation. The Vatican's engagement with AI governance is not new but has intensified sharply under Leo. He identified AI as one of humanity's biggest challenges within days of his election 16 months ago. He dedicated his first encyclical to the subject. And in May, he took the unusual step of personally co-launching the encyclical alongside Anthropic cofounder Christopher Olah at a Vatican event — a deliberate attempt to bridge the gap between Silicon Valley's technical elite and institutional moral authority. What the Vatican actually has is convening power, not regulatory power. Leo called on Monday for "political leaders, leaders of AI, social organisations, associations to come together" — the language of summits and dialogues, not legislation. The Vatican can host conversations and apply moral pressure. It cannot write rules, impose fines, or condition market access. Its leverage depends entirely on whether political leaders with actual regulatory authority — primarily in the EU, US, and China — find it useful to have a neutral moral arbiter in the room. The strategic gap is real. The EU has its AI Act. China has its own regulatory apparatus. The US under Trump is explicitly deregulating. The Vatican is inserting itself into a governance vacuum that exists precisely because the most powerful actor — the US — has decided the vacuum is the policy. Leo's rhetoric lands in a moment where the people building the most capable AI systems are also the ones who most loudly insist no governance is needed. The pope's call to "promote dialogue, study, investigation" is structurally modest — it asks for process, not outcomes. But the directness of his criticism marks an escalation. Calling out a sitting US president's framing as wrong and a major tech CEO's position as contradictory is not typical papal diplomacy. Leo is betting that moral authority and public concern can create political space for governance that currently does not exist. Whether that bet pays off depends on whether any major government decides that AI governance is worth the political cost of confronting the industry. The Vatican can raise the salience of the issue. It cannot resolve it.
