The Vatican's nuclear line: no weapons, no attacks

At the IAEA's 70th General Conference, the Holy See backed peaceful atomic energy and drew hard limits around weapons, wartime strikes, and AI.

Sep 15, 2026

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The Vatican's nuclear line: no weapons, no attacks

At the IAEA's 70th General Conference, the Holy See backed peaceful atomic energy and drew hard limits around weapons, wartime strikes, and AI.

In brief

At the IAEA's 70th General Conference, the Holy See backed peaceful atomic energy and drew hard limits around weapons, wartime strikes, and AI. The right to use nuclear technology peacefully comes bundled with duties: no weapons, no attacks on facilities, and human oversight of any AI in the loop. Originally reported…

A red line in Vienna

Archbishop Gallagher in his address to the 70th General Conference of the International Atomic Energy Agency (IAEA)

Archbishop Paul Richard Gallagher told the IAEA's 70th General Conference on September 15 that states should renounce nuclear weapons while keeping the peaceful use of atomic energy.

“Archbishop Gallagher: States should renounce nuclear weapons”

Seventy years, same principles

Archbishop Gallagher addressing the conference

The Holy See was an original IAEA signatory. Gallagher, carrying Pope Leo XIV's greetings, said the geopolitics and the technology have changed but the ethical frame has not.

“must be guided by sound ethical principles, be used for the service of peace and integral human development, and be protected from any destructive use”

Access without discrimination

Nuclear science should serve the common good, and the benefits cannot be reserved for a few. The IAEA's technical cooperation and capacity building help close the gap between nations.

“a vital step towards sustainable development and reducing disparities among nations”

The right comes with a duty

Gallagher's central point: peaceful use is not a standalone entitlement. It is tied to the pledge by non-nuclear-weapon states never to acquire a bomb.

“the responsible exercise of the right to the peaceful use of nuclear technology is inseparable from the accompanying commitments and responsibilities”

Chernobyl at forty

Marking the disaster's 40th anniversary, he argued that meeting rising energy demand must be balanced by transparency and a firm commitment to safety and security.

Never strike a reactor

Protecting nuclear plants is urgent in armed conflict. A radioactive release would carry humanitarian and environmental harm far past the border where it started.

“attacks on nuclear facilities must never occur”

Keep a human in the loop

Keep a human in the loop

On AI in the nuclear sector, Gallagher asked for risk awareness, effective human oversight, strong safety standards and international cooperation, citing Pope Leo XIV's encyclical Magnifica humanitas.

“If we focus solely on contingencies, we risk letting the succession of emergencies dictate the direction of our path.”

At a glance

The right to use nuclear technology peacefully comes bundled with duties: no weapons, no attacks on facilities, and human oversight of any AI in the loop.

Read the original on Vaticannews

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