Pope calls for ban on lethal autonomous weapons and warns about AI

Pope Leo XIV on Friday issued an appeal in defense of the ban on lethal autonomous weapons and said decisions affecting human life could not be delegated to artificial intelligence. The statement was made in an official Vatican statement, without detailing the specific place or event in which it occurred.

The pope’s demonstration reignites the global debate over the use of weapons systems that operate without direct human control. According to the Pope, technology cannot replace moral conscience in decisions that involve taking lives. The source did not detail whether the appeal was addressed to governments, international bodies or the scientific community.

Appeal against lethal autonomy

Leo XIV stressed that artificial intelligence, when applied to war contexts, represents a risk to human dignity. He stressed that responsibility for life and death decisions should remain in the hands of people, not algorithms. The pope did not cite specific countries or conflicts, but the tone was of global alert.

Speech comes at a time when several nations are discussing the regulation of autonomous weapons. International organizations and activists have been pushing for a treaty banning these systems, but there is still no consensus. The source did not elaborate on whether the Vatican intends to submit a formal proposal to the UN or other forums.

Context of the international debate

Lethal autonomous weapons are systems capable of selecting and attacking targets without human intervention. They use sensors, artificial intelligence and decision algorithms to operate in combat scenarios. Critics point out that these equipment may violate international humanitarian law, as they do not adequately distinguish between fighters and civilians.

Pope Leo XIV joins other religious and political leaders who have already spoken out against this technology. In 2023, UN Secretary-General António Guterres called for a ban on autonomous weapons by 2026. The source did not detail whether the pontiff mentioned this deadline or referred to earlier initiatives.

Reactions and next steps

So far, there has been no official reaction from governments or international bodies to the pope’s statement. The source did not detail whether the Vatican plans a diplomatic campaign on the issue. Experts heard by the international press assess that the appeal could reinforce the pressure for a binding treaty.

The positioning of Leo XIV also echoes broader ethical concerns about the use of artificial intelligence in other areas such as health, justice and surveillance. The pope had already expressed the need for an "algorithm," or ethics of algorithms, in earlier documents. The source did not elaborate on whether Friday’s speech included a series of talks about technology.

Why it matters

The debate on lethal autonomous weapons directly affects global security and human rights. If these weapons are normalized, conflicts may become more frequent and less accountable, as there would be no human operator to be tried for war crimes. The pope’s appeal reinforces the urgency of clear rules before the technology spreads.

To the Brazilian reader, the subject may seem distant, but Brazil participates in discussions on artificial intelligence and defense. The country does not yet have lethal autonomous weapons, but it follows the debates in forums such as the UN. The source did not detail whether the Brazilian government commented on the pope’s statement.

What's next

It is expected that Leo XIV’s speech will be discussed at international meetings on disarmament and artificial intelligence. The Vatican can use its diplomatic influence to bring the issue to UN assemblies or conferences on technological ethics. The source did not detail the Holy See’s next concrete steps.

Meanwhile, civil society and non-governmental organizations must step up campaigns to ban these weapons. The papal appeal can serve as a catalyst for new alliances between religions, governments and the private sector. The source did not detail whether a formal Vatican document on the matter was foreseen.

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