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Taking the Pulse: Can Europeans Build Their Independent Extended Nuclear Deterrent?

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Confronted with a U.S. disengagement and the Russian threat, Europeans are reconsidering their stance on nuclear deterrence. Given the capabilities of the French and British arsenals, can Europe develop an independent nuclear deterrent?

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[...]

Héloïse Fayet , Research Fellow and Head of the Deterrence & Proliferation Research Program at the Institut Français des Relations Internationales

Forget the fantasy of a Eurobomb or a travelling nuclear suitcase between EU capitals. The real question is how to better leverage the existing arsenals of France and the UK in a Europe where Washington’s commitment is no longer a given. What happens if NATO allies can’t trust that the United States will trade Boston for Berlin?

The answer is not to mimic the American model with tactical nukes scattered across the continent. If Paris and London were to extend deterrence, it would be because their national security is inextricably tied to Europe’s stability. Any adaptation must reflect this.

For France, that could mean clarifying its vital interests and going beyond presidential speeches that require explaining to be correctly understood by allies—but without sharing nuclear decisionmaking or stationing warheads abroad. Those are currently a no-go for Paris. Conventional forces, missile defense, and deep precision strikes must also be part of the equation. Instead of obsessing over warhead numbers, why not start by reinforcing French deployments on NATO’s Eastern flank?

Even though the UK considers it already participates in European security through its nuclear contributions to NATO, London must American-proof its long-term nuclear future in case of diminished cooperation with the United States.

The time for pragmatic nuclear dialogue and political commitments is now.

[...]

> Read the full commentary on Carnegie's website.

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heloise fayet

Héloïse FAYET

Intitulé du poste

Research Fellow and Head of the Deterrence and Proliferation program, Security Studies Center, Ifri

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Security Studies Center
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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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Deterrence and Proliferation
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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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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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Date de publication
24 January 2025
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Date de publication
09 September 2025
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As Russia continues to threaten Europe, the Trump administration is making no secret of its desire to withdraw—at least partially—from the defense of the Old
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How should Britain and France cooperate to realise the Northwood Declaration?

Date de publication
18 July 2025
Accroche

During his state visit to the United Kingdom (UK) last week, Emmanuel Macron, President of France, signed a joint declaration with Sir Keir Starmer, Prime Minister, on nuclear cooperation between Britain and France. The Northwood Declaration highlights that while both countries’ nuclear arsenals remain sovereign, cooperation on nuclear deterrence can ‘contribute significantly’ to the security of the North Atlantic Treaty Organisation (NATO) and the Euro-Atlantic region.

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Sous-marin à propulsion nucléaire
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