Nuclear Nonproliferation Outcomes Stall in Backdrop of Geopolitical Strife

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Du Hung Viet (left), President of the Eleventh Review Conference for the NPT 2026, chairs the closing session of the NPT Review Conference (27 April-22 May). Credit: UN Photo/Loey Felipe

UNITED NATIONS, Jun 15 2026 (IPS) - On principle, the nonproliferation of nuclear weapons is an issue that unites the international community. But for a select few states, these principles came with conditions and a refusal to compromise on their security strategy.

The Eleventh Review Conference of the Parties to the Treaty on the Non-Proliferation of Nuclear Weapons (NPT) concluded on May 22, 2026 without member states reaching consensus on a final outcome document. It was the culmination of four weeks of extensive debates starting on April 27, along with the special meetings, consultations and briefings that preceded the conference.

Compared to earlier editions shared before and during the conference, the final draft weakened much of the language surrounding the obligations of nuclear states, including those that related to disarmament efforts. Yet even with these concessions, for the third time in a row after 2015 and 2022, the NPT parties failed to adopt an outcome document.

At the closing session of the conference, Do Hung Viet, President of the NPT Conference and the UN Permanent Representative of Vietnam, remarked that the collective threat posed by nuclear weapons requires a collective response. He warned that in 2031, the NPT would pass 20 years without an outcome. It was the responsibility of state parties, he said, to uphold the NPT until Article VI, which calls for parties to pursue disarmament measures in good faith, could be implemented, and they needed to bolster the treaty as a tool to address modern threats.

Following the closing of the conference, Viet told reporters that the current state of the international environment requires “urgent action” in the face of recent tensions. Although the conference could not reach consensus, Viet attempted to find some positives in the proceedings, in that the engagement “highlights the value of the NPT and multilateralism as a whole”. Yet he expressed concern for the health of the treaty going forward as it related to state parties’ commitments.

Izumi Nakamitsu, UN Under-Secretary-General and High Representative for Disarmament Affairs, added that if parties to the NPT wanted to prevent a “further decrease of confidence” in the nuclear nonproliferation regime, then they “need to visibly make a commitment” through measurable steps.

She remarked that the international community at large needed to take lessons from the proceedings, starting with the acceleration of disarmament commitments under existing treaties. There were also increased calls for a “strengthening of the review process”, or enhancing accountability and transparency measures over the implementation of countries’ commitments to the NPT.

“Nonproliferation and disarmament are two sides of the same coin, and it is simply wrong for nuclear weapons states to assume that nonproliferation obligations will be just adhered to without nuclear weapons states’ commitment and implementation of disarmament commitments under Article 6,” said Nakamitsu.

Susi Synder (left), ICAN Director of Programmes, and Seth Sheldon (right), ICAN’s UN Liaison, at a press briefing held on the final day of the NPT 2026 Review Conference. Credit: Naureen Hossain/IPS

Parties to the NPT, including nuclear-armed states, repeatedly acknowledged the NPT as a “cornerstone” for multilateral diplomacy and the nuclear disarmament regime. However, when it came to other nuclear treaties, such as the Comprehensive Nuclear-Test-Ban Treaty (CTBT) and the Treaty for the Prohibition of Nuclear Weapons (TPNW), such acknowledgements were scarce. The final outcome draft makes a limited few references to these treaties but does not elaborate on the disarmament requirements outlined in them.

The final outcome document draft was noteworthy for its references to the humanitarian and environmental impacts of nuclear testing for the first time in the context of the NPT Review Conference. Experts from the International Campaign Against Nuclear Weapons (ICAN) noted that this was possible thanks to the advocacy efforts of civil society and of the communities impacted by nuclear weapons use and testing.

In particular, the draft “ recognise[s] the growing calls for assistance to the people and communities affected by nuclear weapons use and explosive nuclear testing and for environmental remediation following nuclear weapons use and explosive nuclear testing” and “ welcome[s] efforts already undertaken in this regard”.

The draft also included a call for member states to “take concrete measures t…