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The NPT and the Origins of NATO’s Nuclear Sharing Arrangements

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Proliferation Papers
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Accroche

Russia has recently accused the United States and NATO Allies of violating the Treaty on the Non-Proliferation of Nuclear Weapons (NPT) by arguing that NATO's nuclear sharing arrangements are not permitted under the Treaty.

Corps analyses

On the contrary, the historical record shows that the text of the NPT was crafted by the US and the USSR, in close cooperation, precisely so that NATO's arrangements would be compatible with Treaty obligations – while also constraining the ability of non-nuclear states to acquire nuclear weapons. This paper shows how the US and USSR negotiated Articles I and II – the critical parts of the NPT pertaining to nuclear weapons proliferation. The US explored multiple options and sought to balance several (sometimes conflicting) objectives during these negotiations, from managing its key bilateral relationships (particularly with the USSR and West Germany), to strengthening NATO's defensive capacity and credibility, and, finally, to preventing the further spread of nuclear weapons. Ultimately, the NPT proved successful because the final text proved satisfactory to alleviate the concerns of all parties involved – the superpowers, NATO, the Warsaw Pact and the neutral non-aligned countries.

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The NPT and the Origins of NATO’s Nuclear Sharing Arrangements

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 A soldier watching a sunset on an armored infantry fighting vehicle
Security Studies Center
Accroche centre

Heir to a tradition dating back to the founding of Ifri, the Security Studies Center provides public and private decision-makers as well as the general public with the keys to understanding power relations and contemporary modes of conflict as well as those to come. Through its positioning at the juncture of politics and operations, the credibility of its civil-military team and the wide distribution of its publications in French and English, the Center for Security Studies constitutes in the French landscape of think tanks a unique center of research and influence on the national and international defense debate.

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Nuclear ballistic missile submarine, in transit on the surface
Deterrence and Proliferation
Accroche centre

The conflicts in Europe, Asia and the Middle East demonstrate a return of nuclear power to the balance of power. Arsenals are being modernized and expanded, while arms control is collapsing. This research program aims to analyze these phenomena.

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Main Battle Tank: Obsolescence or Renaissance?

Date de publication
17 November 2025
Accroche

Since February 2022, Russian and Ukrainian forces combined have lost more than 5,000 battle tanks, a much higher volume than all the European armor combined. Spearhead of the Soviet doctrine from which the two belligerents came, tanks were deployed in large numbers from the first day and proved to be a prime target for UAVs that became more numerous and efficient over the months. The large number of UAV strike videos against tanks has also led a certain number of observers to conclude, once again, that armor is obsolete on a modern battlefield. This approach must, however, be nuanced by a deeper study of the losses and their origin, UAVs rarely being the sole origin of the loss itself, often caused by a combination of factors such as mines, artillery or other anti-tank weapons.

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Mapping the MilTech War: Eight Lessons from Ukraine’s Battlefield

Date de publication
12 February 2026
Accroche

This report maps out the evolution of key technologies that have emerged or developed in the last 4 years of the war in Ukraine. Its goal is to derive the lessons the North Atlantic Treaty Organization (NATO) could learn to strengthen its defensive capabilities and prepare for modern war, which is large-scale and conventional in nature.

Élie TENENBAUM Bohdan KOSTIUK Daryna-Maryna PATIUK Anastasya SHAPOCHKINA
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"Iron Swords" A Military Analysis of Israel's War in Gaza

Date de publication
02 October 2025
Accroche

On October 7, 2023, Hamas' attack, dubbed “Al-Aqsa Flood,” caused a major shock and led Israel to launch the longest war in its history. Operation “Iron Swords” was notable for its unprecedented intensity, both in terms of the massive ground forces deployed and the firepower used.

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Saudi Arabia’s Nuclear Temptations. Lessons Learned from Regional Instability

Date de publication
11 September 2025
Accroche

Saudi Arabia’s integration in the international arena and regional stability, notably through reducing its dependence on fossil energies, are crucial elements for the success of the Kingdom’s Vision 2030, the Crown Prince’s top priority. However, Mohammed bin Salman’s declarations in 2018 and 2021, indicating that “if Iran develops a nuclear bomb, we will follow suit as soon as possible”, combined with the recent strikes on key Iranian nuclear facilities, do not bode well for the future of the Kingdom, the region and the non-proliferation regime at large.

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The NPT and the Origins of NATO’s Nuclear Sharing Arrangements