The Holy See issued a stark assessment at the UN Conference on Disarmament, labeling the weaponization of Artificial Intelligence (AI) as a primary driver of a moral crisis. The Vatican called for a moratorium on AI weapons development, noting that international organs designed to prevent catastrophe are being sidelined. The statement coincided with the U.S. moving rapidly to implement an AI acceleration policy that includes developing autonomous weapons systems. The Holy See representative criticized the shift from consensus-based diplomacy to one based on force, which undermines the Conference on Disarmament's purpose of negotiating multilateral disarmament instruments.
9 days ago
The Holy See addressed the high-level segment of the UN's Conference on Disarmament in Geneva on February 26, 2026.1
Monsignor Daniel Pacho represented the Vatican, describing AI weaponization as a key driver of a moral crisis facing humanity at a "critical juncture."1
He noted that post-WWII international bodies to prevent catastrophe are largely sidelined.1
Pacho highlighted a shift from consensus-based diplomacy to one relying on force by individuals or alliances.1
This has undermined the Conference's purpose of negotiating multilateral disarmament, established in 1978 with nuclear powers and others.1
Past successes exist, but impasses persist since at least 2008.1
The statement coincides with US Defense Secretary Pete Hegseth's January memo on AI Acceleration Strategy.1
It mandates incorporating AI and autonomy into military planning, tactics, and experimentation.1
Industry leaders face backlash threats for reluctance on autonomous weapons and espionage.1
A related US policy reportedly disrupts industry and conflicts with Holy See views.1
Pacho reiterated opposition to lethal autonomous weapons systems (LAWS).1
Emerging technologies make wars "cold and detached," removing human moral judgment and responsibility.1
This lowers conflict thresholds; human control in force use is essential.1
The Holy See demands an immediate moratorium on LAWS development and use.1
Vatican urges AI weapons moratorium to safeguard global moral order
The Vatican, through recent papal messages, doctrinal notes, and diplomatic interventions, consistently urges a moratorium and ultimate prohibition on lethal autonomous weapon systems (LAWS)—AI-driven weapons capable of selecting and engaging targets without meaningful human control—to preserve human dignity, moral responsibility, and the global ethical order. This stance reflects the Church's broader teaching that AI must serve the human person, not supplant human moral judgment, especially in life-and-death decisions.
Pope Leo XIV has repeatedly highlighted the dangers of militarized AI, emphasizing its role in eroding human responsibility. In his Message for the 59th World Day of Peace (2026), he decries how "further technological advances and the military implementation of artificial intelligence have worsened the tragedy of armed conflict," noting a "growing tendency among political and military leaders to shirk responsibility, as decisions about life and death are increasingly ‘delegated’ to machines." This "unprecedented and destructive betrayal of the legal and philosophical principles of humanism" threatens civilization itself, driven by private economic interests that demand awakening conscience and critical thought.
Echoing Pope Francis, Leo XIV references concerns that remote-control systems and AI lessen the perception of war's devastation, fostering a "cold and detached approach" while making conflict more viable and precipitating arms races. In addresses like that to the G7 (2024), Francis stressed that no machine should choose to take human life, calling for greater human control.
The Dicastery for the Doctrine of the Faith's Antiqua et Nova (2025) provides the most comprehensive Catholic analysis, devoting a section to "AI and Warfare." It identifies LAWS as a "cause for grave ethical concern" due to their lack of "the unique human capacity for moral judgment and ethical decision-making." Pope Francis is cited urging "an effective and concrete commitment to introduce ever greater and proper human control," with an outright call to prohibit such weapons.
The document warns that AI weaponization violates just war principles, as it undermines war as a "last resort" and risks catastrophic human rights consequences. Footnotes reinforce this with Holy See UN statements: LAWS "can never be morally responsible subjects capable of complying with international humanitarian law," and sophisticated weapons risk falling into wrong hands, fueling terrorism.
Archbishop Gabriele Caccia, Holy See Permanent Observer to the UN, has advanced this position in key forums. In 2023, he supported UN Secretary-General's call for a "legally binding instrument to prohibit lethal autonomous weapons systems... by 2026," urging states to refrain from development in the interim, as such weapons "violate the dictates of public conscience." He linked this to explosive weapons in populated areas, promoting protection over collateral damage.
In 2022, Caccia called for a "moratorium on the development and use of LAWS pending the negotiation of a legal instrument," arguing they "irreversibly alter the nature of warfare" by detaching it from human moral agency and International Humanitarian Law. These interventions align with Vatican II's Gaudium et Spes, rejecting machines' role in decisions affecting life.
This urgency stems from the Church's anthropology: AI is a human tool, not an autonomous agent, and must reflect justice, solidarity, and reverence for life. Pope Leo XIV stresses AI's origin in God's creative gift, requiring "moral discernment" to avoid expressing flawed visions of humanity. In governance contexts, he notes AI's potential for good but warns of misuse for "selfish gain" or aggression, prioritizing "integral development" materially, intellectually, and spiritually.
Broader teachings affirm technology's service to man: it must respect moral criteria, not replace human freedom or relationships. As Populorum Progressio warns, unchecked "technocracy" harms humanity if it diminishes mastery over actions. Antiqua et Nova integrates this, ensuring AI reinforces the human-environment covenant mirroring God's love.
The Vatican's call safeguards a moral order where humans retain responsibility for peace, echoing Saint Francis of Assisi's disarming witness. It challenges technocratic presumption, urging interdisciplinary ecclesial efforts for AI in evangelization, not destruction. Without prohibition, AI risks normalizing dehumanized warfare, contradicting the common good.
In summary, the Vatican's advocacy for an AI weapons moratorium—escalating to prohibition—is rooted in protecting irreplaceable human moral judgment, as articulated by Pope Leo XIV, Antiqua et Nova, and UN diplomacy. This upholds Catholic social doctrine, ensuring technology serves dignity and peace.