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Public ForumNovember/December 2026International Relations

NATO and the Nuclear Ban Treaty

Should Europe's NATO members sign up to a treaty that outlaws nuclear weapons, while Russia, the United States and their own allies keep them?

Resolution

Resolved: European members of the North Atlantic Treaty Organization should ratify the Treaty on the Prohibition of Nuclear Weapons.

By Debatery Editing Team5 Aff · 5 Neg · 26 sourcesOctober 2026
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Background

The Treaty on the Prohibition of Nuclear Weapons (TPNW), often called the nuclear ban treaty, was adopted at the United Nations on July 7, 2017, by a vote of 122 to 1, with one abstention. The Netherlands, a NATO member, cast the single "no" vote, citing its alliance commitments, and the United States and 40 other countries stayed away from the negotiations.13 The treaty entered into force on January 22, 2021, after its 50th ratification. By late September 2025, 74 countries had ratified or joined it and 99 had signed, ratified or acceded, a majority of the world's states. No country with nuclear weapons has joined.12

The treaty bans developing, testing, producing, possessing, using or threatening to use nuclear weapons. It also bans helping anyone do those things and allowing another country's nuclear weapons to be stationed on a member's territory.125 That last rule matters for Europe. The United States keeps an estimated 100 nuclear bombs at six bases in five European NATO countries: Belgium, Germany, Italy, the Netherlands and Turkey. Pilots from those countries train to deliver them in a crisis, an arrangement called "nuclear sharing."6 Two European members, the United Kingdom and France, have their own arsenals; France has about 290 warheads.8 NATO's 2022 Strategic Concept states: "As long as nuclear weapons exist, NATO will remain a nuclear alliance."5

NATO has opposed the treaty as a bloc. When it entered into force, the North Atlantic Council said the allies "collectively reiterate our opposition to this treaty," calling it "at odds with the existing non-proliferation and disarmament architecture."4 Some allies have still watched closely. Germany, the Netherlands and Norway attended the first meeting of treaty members in Vienna in June 2022 as observers, along with Finland and Sweden, which have since joined NATO. Germany's delegate said his country "cannot accede to the TPNW, which would collide with our membership in NATO including nuclear deterrence."13 In Belgium, a 2020 parliamentary motion to remove the US weapons and sign the treaty failed by just 74 votes to 66.16

The security picture has darkened since the treaty was written. In November 2024, Russia revised its nuclear doctrine so that an attack by a non-nuclear country backed by a nuclear power counts as a "joint attack" on Russia.12 The last US-Russia arms control treaty, New START, expired on February 5, 2026, leaving no limits on either side's strategic forces for the first time in decades.11 The world held an estimated 12,241 warheads in January 2025, and China's arsenal was growing by about 100 a year.7 In March 2026, French President Emmanuel Macron announced that France would increase its number of warheads and allow its nuclear-armed aircraft to deploy temporarily to eight European countries.8

The timing of this topic is sharp. The treaty's first Review Conference is scheduled for November 30 to December 4, 2026, in New York, in the middle of the period when this resolution is debated.2 Debaters on both sides will be arguing about a live question: whether Europe's way to safety runs through nuclear deterrence or through a legal ban.

Key terms

European members of NATO
Every NATO member except the United States and Canada. This includes two nuclear-armed states (the UK and France) and the five countries that host US bombs.6 Aff teams often read it as "European members, generally or as a group." Neg teams may argue it means every European member, so the UK and France must give up their arsenals under the treaty's Article 4.25 Some teams also debate whether Turkey, which spans Europe and Asia, counts.
Should
A word of desirability: the question is whether ratifying would be a good idea, not whether it will happen. Public Forum has no formal plans, so both teams debate the likely world where these countries ratify against the world where they do not.
Ratify
To formally agree to be legally bound by a treaty, usually after signing it and getting approval at home. NATO members have stayed out of the treaty,4 so in practice they would accede without signing first, which has the same legal effect; four states have already joined that way without signing first.2 Membership is open-ended, and withdrawal takes 12 months and cannot take effect while the state is in an armed conflict.25
Treaty on the Prohibition of Nuclear Weapons
The 2017 UN treaty that bans nuclear weapons outright (Article 1), sets out how nuclear states and host states would disarm (Article 4), and commits members to help victims of nuclear use and testing.125 Supporters call it a ban treaty; NATO calls it out of step with the NPT system.4
Nuclear umbrella (extended deterrence)
A nuclear power's promise to defend an ally with nuclear weapons if needed. Harvard Law's human rights clinic argues a TPNW member must "withdraw from the protection of a nuclear umbrella" but can stay in its alliance.17 NATO describes US strategic forces as "the supreme guarantee of the security of the Alliance."5
Nuclear sharing
NATO's system in which US bombs are stored in allied countries and allied aircraft are certified to carry them.6 NATO calls these "dual-capable aircraft" contributions "central" to its deterrence.5 A Chatham House legal study calls the arrangement "impossible to reconcile" with the treaty's ban on stationing.4
NPT
The 1968 Non-Proliferation Treaty, under which non-nuclear states promise not to build weapons and nuclear states promise to work toward disarmament (Article VI). NATO calls it "the essential bulwark against the spread of nuclear weapons."5 Whether the TPNW strengthens or undercuts it is a core clash.3

Weighing

Both sides on this topic usually claim the same huge impact: nuclear war or a major war in Europe. That means rounds are rarely won on magnitude alone. They are won on which side has the stronger link to that impact and on how likely and how soon it is.

Magnitude

Aff teams point to a study finding that a full US-Russia nuclear war could leave more than 5 billion people dying of hunger.21 Neg teams answer that deterrence exists to prevent exactly that war, so the size of the impact cuts both ways. Ask: whose argument changes the chance of that outcome?

Probability

Neg tends to win probability by showing concrete threats now: Russia's 2024 doctrine and the end of New START.1112 Aff wins it by showing that more weapons in more places, with fewer limits, makes an accident or escalation more likely, and that ratification reverses that trend.

Timeframe

Neg harms are fast: an alliance split or Russian pressure could come right after ratification. Aff benefits are often slower: building a global norm, adding pressure at the 2026 Review Conference and beyond.2 Aff should explain why a slow benefit still outweighs.

Reversibility

Leaving the treaty takes 12 months and is frozen during an armed conflict.25 Neg says that locks Europe into a choice it cannot undo if threats grow. Aff says that is the point: a ban that is hard to escape is a ban that holds.

Scope

Aff impacts are often global (the norm, a world without nuclear weapons). Neg impacts are often regional (Europe, NATO's eastern flank). Teams should say why their scope matters more, not just assert it.

Aff burden

Show that ratification by Europe's NATO members makes Europe and the world safer than the status quo. Aff does not need to prove that nuclear-armed states will disarm, only that ratifying moves things in that direction more than it risks. Aff should be ready to defend what happens to US bombs in host countries and, if Neg presses the "every member" reading, to the UK and French arsenals.

Neg burden

Show that ratifying would do more harm than good. Neg does not need to defend nuclear weapons forever, or the treaty's goals as wrong; it can agree a nuclear-free world is ideal and argue this treaty, now, is the wrong way there. Neg should avoid only attacking the treaty's text and should link harms to these specific countries joining.

Affirmative arguments

Negative arguments

Key clashes

Most rounds on this topic come down to these four questions.

1Is deterrence keeping Europe safe, or putting it at risk?

The core of nearly every round.

Aff saysDeterrence only has to fail once. With New START gone and Russia loosening its doctrine, relying on nuclear threats is a growing gamble with catastrophic stakes.111221
Neg saysNATO's nuclear posture exists to "deter aggression," and Ukraine's fate after giving up its weapons shows what happens when assurances are weak.524

2Can a country join the treaty and stay in NATO?

A legal question and a political one.

Aff saysThe North Atlantic Treaty does not mention nuclear weapons, and legal studies find a member can stay in the alliance after giving up the umbrella.174
Neg saysAllies' own governments say joining "would collide" with NATO membership, and nuclear sharing cannot survive the stationing ban.134

3Would ratifying mean fewer bombs in Europe, or more?

Both sides use France and Poland as evidence.

Aff saysEurope is sliding into a new arms race, with more French warheads and Poland eyeing nuclear options. A binding ban stops the spiral.810
Neg saysThose moves come from fear of Russia. Take away the US umbrella and more states, not fewer, will want their own bombs.2410

4Does the treaty matter if no nuclear power joins?

Norms versus numbers.

Aff saysNorms come first. Most of the world has backed the treaty, and Europe joining would leave nuclear states and few others as objectors.24
Neg saysNo warhead is removed while Russia and China build up. Only talks among nuclear powers cut arsenals.2711

Responses to prep

For the Aff

If they sayUkraine shows countries that give up nuclear protection get invaded.

AnswerUkraine had only a non-binding memorandum, with no defense commitment like NATO's Article 5.24 TPNW members keep Article 5, because the North Atlantic Treaty never mentions nuclear weapons.17

If they sayJoining would break NATO.

AnswerHarvard Law's human rights clinic found members could stay in the alliance, and Norway's study found "no legal obstacles."418 Disagreement is political, and allies already disagree on many issues without leaving.

If they sayThe treaty has not removed a single warhead.

AnswerA ban is not meant to remove warheads on day one; it builds pressure over time. NATO itself works hard to block the treaty from becoming customary law, which shows it believes the norm can bite.4

If they sayThe treaty's verification is weak.

AnswerEuropean states can join and adopt the stronger IAEA standard critics recommend; the fix critics propose is to add the Additional Protocol, not to stay out.20 Article 4 already requires verified, time-bound disarmament plans.3

For the Neg

If they sayJoining is legally compatible with NATO.

AnswerEven supporters admit members must give up the umbrella, and Germany and Norway told treaty members in 2022 that joining would conflict with their NATO obligations.1713 Legal compatibility on paper is not alliance credibility in a crisis.

If they sayEuropeans want the treaty.

AnswerThose polls were commissioned by the campaign that promotes the treaty.1415 When elected parliaments voted, as in Belgium in 2020, the motion failed.16

If they sayNuclear risk is rising.

AnswerAgreed, and that is the reason to keep deterrence. Russia's doctrine and arsenal do not shrink when Europe signs a treaty Russia ignores.127

If they sayThe treaty stops a European arms race.

AnswerIt binds only members. Poland's push for nuclear options comes from fear of Russia, and losing the US umbrella would make that fear worse, not better.1024

Where it is used

This is the National Speech and Debate Association (NSDA) Public Forum resolution for November and December 2026. It is used at NSDA district tournaments and at invitational tournaments held during that period. The treaty's first Review Conference (November 30 to December 4, 2026) falls inside the topic window, so expect fresh news and evidence mid-season.2

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Sources

  1. United Nations Office for Disarmament Affairs, "Treaty on the Prohibition of Nuclear Weapons: Treaty overview." LinkUN agency
  2. "Nuclear Ban Treaty Crosses Majority Threshold," Arms Control Today, Arms Control Association, November 2025. LinkPolicy journal
  3. Congressional Research Service, "The Nuclear Ban Treaty: An Overview," IN10731, January 25, 2021. LinkGovernment report
  4. Steven Hill, "NATO and the Treaty on the Prohibition of Nuclear Weapons," Chatham House research paper, January 2021 (updated March 2021). LinkThink tank
  5. NATO, "NATO 2022 Strategic Concept," adopted at the Madrid Summit, June 29, 2022. LinkAlliance document
  6. Center for Arms Control and Non-Proliferation, "Fact Sheet: U.S. Nuclear Weapons in Europe," August 2021. LinkResearch nonprofit
  7. Stockholm International Peace Research Institute (SIPRI), "Nuclear risks grow as new arms race looms: new SIPRI Yearbook out now," June 16, 2025. LinkResearch institute
  8. "France to increase nuclear warheads, lend nuclear aircraft to Europe allies," Al Jazeera, March 2, 2026. LinkNews report
  9. Polish Institute of International Affairs (PISM), "France Invites Allies to a Debate on Extending its Nuclear Deterrent," March 7, 2025. LinkThink tank
  10. "A nuclear Poland? Logistics, political challenges ahead of potential Warsaw deal," Breaking Defense, March 2025. LinkNews report
  11. "For the first time in decades, the U.S. and Russia have no limits on nuclear weapons," NPR, February 4, 2026, via Michigan Public. LinkNews report
  12. "Russia's Putin signs updated doctrine that lowers threshold for using nuclear weapons," CBC News (Associated Press), November 19, 2024. LinkNews report
  13. "States-Parties Meet on Nuclear Arms Ban Treaty," Arms Control Today, July/August 2022. LinkPolicy journal
  14. International Campaign to Abolish Nuclear Weapons (ICAN), "Populations in 6 NATO states overwhelmingly support the TPNW" (YouGov polling), 2021. LinkAdvocacy group poll
  15. ICAN, "77% of Belgians support joining the TPNW: Poll" (YouGov, November 2020), December 3, 2020. LinkAdvocacy group poll
  16. "Belgium narrowly rejects removal of US nuclear weapons," The Brussels Times, January 17, 2020. LinkNews report
  17. International Human Rights Clinic, Harvard Law School, "Nuclear Umbrella Arrangements and the Treaty on the Prohibition of Nuclear Weapons," June 2018. LinkAcademic legal analysis
  18. International Human Rights Clinic, Harvard Law School, "New Clinic Reports Call on NATO Members, Sweden to Join Nuclear Weapon Ban Treaty," June 7, 2018. LinkAcademic legal analysis
  19. Andrea Berger, "Swiss and Swedish Inquiries on the Nuclear Ban Treaty," Arms Control Wonk, 2019. LinkExpert analysis
  20. Nuclear Threat Initiative, "New Paper Calls on States that Sign the Nuclear Ban Treaty to Adhere to Strict IAEA Safeguards" (on John Carlson's paper), December 2, 2021. LinkResearch nonprofit
  21. University of Colorado Boulder, "Nuclear war would cause global famine and kill billions, study finds" (on Xia et al., Nature Food), August 15, 2022. LinkUniversity research news
  22. ICRC and IFRC, "Humanitarian impacts of nuclear weapons are beyond the capacity of any humanitarian organization to address effectively," joint statement to the Third Meeting of States Parties, March 5, 2025. LinkHumanitarian organization
  23. "US State Dept Approves $8.4B F-35 Sale to Germany," The Defense Post, August 1, 2022. LinkNews report
  24. Ariel E. Levite, "Why security assurances are losing their clout as a nuclear nonproliferation instrument," Bulletin of the Atomic Scientists, June 29, 2022. LinkExpert analysis
  25. Treaty on the Prohibition of Nuclear Weapons, full text (2017), hosted by the Centre for International Law, National University of Singapore. LinkTreaty text
  26. ICAN, "Hiroshima and Nagasaki bombings." LinkAdvocacy group