Pope Leo Issues AI Encyclical Calling for Disarmament, Backlash Against Big Tech Power Concentration

In May 2026, Pope Leo issued the encyclical *Magnifica Humanitas* at the Vatican, addressing the militarization and power concentration of artificial intelligence. The document calls on developers to "disarm" AI systems and prioritizes human-centered oversight.

Event Background and Encyclical Release

In May 2026, Pope Leo personally issued the encyclical Magnifica Humanitas at the Vatican, with notable technology figures such as Anthropic co-founder Christopher Olah in attendance. This marks the first time the Vatican has addressed the militarization and power concentration of artificial intelligence in a dedicated document.

Core Stance of the Encyclical: From an "Arms Race" to "Humanity First"

In the encyclical, Pope Leo characterizes AI development as an extension of an "arms race mentality," calling on developers and deployers to voluntarily "disarm." This phrasing does not reject technology itself, but demands that AI systems be stripped of autonomous weaponization capabilities and prevented from exceeding human control. The document also emphasizes that AI must be open to discussion by all, rather than having infrastructure decisions dictated by a handful of economic and technological players.

Differences from Previous Church Documents and Industry Ethics Statements

Previous Vatican documents have focused primarily on bioethics or economic justice. This encyclical is the first to treat data center energy consumption, algorithmic power concentration, and the automation of warfare as a single issue. In contrast to the EU AI Act, which emphasizes compliance categories, or voluntary corporate guidelines in the U.S., which prioritize innovation speed, this encyclical directly addresses power structures: when computing power and data are in the hands of non-state actors, public oversight mechanisms can easily fail.

Anthropic co-founder Christopher Olah, who attended the release, publicly stated that AI development cannot be dominated solely by tech companies. This echoes the encyclical's assessment that "power does not belong to states, but to a small number of economic and technological entities."

Constraints and Gaps in Practical Implementation

The encyclical calls for AI to abide by "the strictest ethical limits" in warfare scenarios and prohibits autonomous systems that operate "beyond human reach." However, it provides no specific technical standards or verification mechanisms, allowing companies to self-certify compliance through internal ethics committees, creating an implementation gap. Energy consumption and data center siting are also mentioned but without quantitative thresholds, enabling companies to continue expanding under existing business models.

Three Actionable Recommendations for Developers

  • Incorporate "auditable kill switches" during model training and deployment to ensure that any autonomous decision path can be manually overridden in real time.
  • Publicly disclose infrastructure energy consumption and geographic distribution data, subject to third-party independent audits, to avoid opaque power structures.
  • Establish multi-stakeholder discussion mechanisms, including religious groups, social organizations, and end users in early-stage design reviews, rather than only soliciting feedback after product release.

Risk and Opportunity Assessment for Enterprises

The encyclical positions AI as a tool that could create "new forms of slavery," directly impacting brand reputation and government procurement decisions. Several European institutions have already stated that they will include the Holy See's stance in their AI supplier evaluation criteria. On the other hand, the emphasis on "human-friendly and accessible" requirements also provides a narrative space for open-source projects focused on interpretability and low-resource deployment.

In the short term, companies should prepare for joint pressure from religious groups and civil society organizations; in the medium term, they need to adjust product roadmaps to prioritize infrastructure requirements that are auditable, interruptible, and shareable.