New START Expired With No Replacement — For the First Time Since 1972, No Nuclear Arms Agreement Exists Between the U.S. and Russia

Why it matters: For the first time since Richard Nixon signed SALT I in 1972, there is no legally binding nuclear arms control agreement between the United States and Russia. No inspection regime. No verified warhead caps. No agreed notification framework for missile tests. And the U.S. foreign policy apparatus is now operated on personal executive intuition rather than the institutional guardrails that arms control was designed to complement.

📝 Summary: For the first time since Richard Nixon signed SALT I in 1972, there is no legally binding nuclear arms control agreement between the United States and Russia. No inspection regime.

What happened

• Feb 5, 2026 — New START — the last remaining nuclear arms control treaty between the U.S. and Russia — formally expires with no successor framework negotiated or in development
• Verification gap — Without New START's inspection protocol, neither side has legal access to verify the other's warhead counts, deployment postures, or delivery system configurations for the first time in 54 years
• Trump's bilateral approach — The Trump administration has pursued direct personal engagement with Putin, bypassing the State Department and Arms Control and Disarmament Agency — removing the institutional crisis management infrastructure arms control was designed to complement
• Russian modernisation — Russia has deployed three new nuclear delivery systems — Avangard hypersonic glide vehicle, Sarmat ICBM, Poseidon nuclear torpedo — none of which were covered by New START's counting rules
• U.S. modernisation — The U.S. Columbia-class submarine programme, B-21 Raider bomber, and Sentinel ICBM replacement are proceeding without a verification framework that would allow Russia to confirm U.S. compliance with previous limits
• Chinese dimension — China, which has never participated in a bilateral nuclear arms control framework, is engaged in the fastest documented nuclear buildup in its history — expanding from ~250 operational warheads in 2020 to an estimated 500+ by 2026

The Big Picture

Historical Context

Nuclear arms control between the U.S. and Soviet Union — and later Russia — began not from idealism but from the near-catastrophic experience of the Cuban Missile Crisis. In October 1962, the world came within hours of nuclear exchange not because either side wanted war, but because both sides lacked the communication and verification infrastructure to prevent miscalculation. The crisis resolution required 13 days of improvised back-channel diplomacy under extreme time pressure.

The institutional response to that near-miss was systematic. The Moscow-Washington hotline (1963), SALT I (1972), the Anti-Ballistic Missile Treaty (1972), SALT II (1979), INF Treaty (1987), START I (1991), START II (2002, never ratified by Russia), the Moscow Treaty (2002), and New START (2010) — each built incrementally on the lesson that reducing the risk of miscalculation-driven nuclear exchange requires verified, legally binding, institutionally-managed frameworks.

The architecture that took 60 years to build is now almost entirely gone. The ABM Treaty was terminated by the U.S. in 2002. The INF Treaty was terminated in 2019, after both sides accused the other of violations. New START expired in 2026 without a successor. The Open Skies Treaty — which provided aerial verification of military movements — died in 2020-2021. What remains is the direct hotline communication channel, which is operational but not sufficient.

The combination of five factors makes the current situation more dangerous than any point since the Cuban Missile Crisis: (1) no verification framework, (2) hypersonic delivery systems that compress decision time below human reaction speed, (3) cyber weapons that can affect nuclear command and control, (4) a U.S. administration that operates on personal intuition rather than institutional crisis management protocols, and (5) a China that is outside all arms control frameworks and expanding rapidly.

Stakeholder Map

By the Numbers

• 54 years — Duration of unbroken U.S.-Soviet/Russian nuclear arms control agreements, 1972–2026 — now terminated
• 1,550 — Deployed strategic warhead limit set by New START — the cap that no longer has legal force
• ~5,550 — Estimated total U.S. nuclear warhead stockpile (including non-deployed) — unverified by Russia since Feb 2026
• ~6,200 — Estimated total Russian nuclear warhead stockpile — unverified by the U.S. since Feb 2026
• 500+ — Estimated Chinese operational nuclear warheads in 2026 — up from ~250 in 2020, outside all arms control frameworks
• ~3 minutes — Decision time available to U.S. and Russian leaders following confirmed hypersonic launch — below meaningful institutional crisis management threshold
• 18 — Bilateral inspections conducted under New START annually — now zero

The delta: The most dangerous combination in nuclear security is not raw capability — both the U.S. and Russia have had survivable second-strike capacity for decades. It is the combination of opacity (no verification) + compressed decision time (hypersonic delivery) + institutional bypass (personal executive intuition rather than structured crisis management). All three are now simultaneously present for the first time since 1962.

Between the Lines

The official narrative frames the end of arms control as a failure of outdated treaties. The unstated reality is that for the key decision-makers in Washington, Moscow, and Beijing, the absence of a verification framework is a strategic advantage. It allows the U.S. administration to pursue personalized diplomacy unconstrained by institutional processes, while enabling Russia and China to modernize their arsenals and leverage nuclear ambiguity as a coercive tool without legal or transparent oversight. The focus on avoiding 'bad deals' masks a deeper shift where the institutional guardrails designed to prevent accidental war are being dismantled in favor of executive intuition. This creates a paradox where the perceived gain in flexibility for leaders comes at the direct cost of systemic stability, a risk that is systematically downplayed because the actors who benefit from the opacity are the same ones responsible for managing the consequences.

NOW PATTERN

Institutional Decay × Escalation Spiral

Institutional Decay × Escalation Spiral

The 54-year architecture that prevented miscalculation-driven nuclear exchange is gone. What replaced it is personal executive intuition and no verification.

Institutional Decay: The Dismantling of 60 Years of Crisis Management Infrastructure

The arms control treaties that expired or were terminated since 2002 were not just documents — they were the operating infrastructure of nuclear crisis management. They provided the legal frameworks, the technical verification protocols, and the diplomatic communication channels that allowed two nuclear superpowers to maintain deterrence without miscalculating their way to war.

The Cuban Missile Crisis was not resolved by brilliant intuition. It was resolved by improvised back-channels that worked by accident. We built the institutional infrastructure precisely so we would never have to improvise again.
— Former U.S. arms control negotiator, Feb 2026 (anonymous)

Without New START, we are flying blind. We don't know what they have deployed, where it is, or what their alert posture is. They don't know ours. That's not a stable deterrence environment.
— Former STRATCOM Deputy Commander, Congressional testimony, Jan 2026

The institutional decay is not the result of a single decision. It is the accumulated product of a series of individually defensible choices that collectively dismantled a system. The U.S. withdrew from the ABM Treaty in 2002 to enable missile defence development. Russia violated the INF Treaty — the U.S. withdrew in response. New START expired without renewal because the political environment for arms control negotiations collapsed between 2022 and 2026.

Each step had a rational short-term justification. The cumulative result is that the crisis management infrastructure built from the Cuban Missile Crisis lesson — that superpower nuclear management requires verified, legally binding, institutionally-managed frameworks — is almost entirely gone.

The institutional decay is particularly dangerous because it is not symmetric with capability. Both sides have maintained and modernised their nuclear forces. What has decayed is the shared information environment that allows each side to correctly assess the other's capabilities and intentions. Without verified information, strategic decisions are made on estimates, signals intelligence, and worst-case assumptions — exactly the conditions that produce miscalculation.

Escalation Spiral: The New Technical Reality Arms Control Was Not Built For

New START was designed for the nuclear technology of the 1980s — intercontinental ballistic missiles, submarine-launched ballistic missiles, and heavy bombers. The weapons systems that Russia has deployed in the 2020s — Avangard hypersonic glide vehicles, Poseidon nuclear torpedoes, Burevestnik nuclear cruise missiles — do not fit New START's counting frameworks. The treaty was already becoming obsolete before it expired.

Hypersonic weapons travel at 20+ times the speed of sound on unpredictable trajectories. They compress warning time below the threshold of human reaction. Arms control frameworks built for ballistic missiles don't address these systems at all.
— Nuclear posture analysis, Bulletin of the Atomic Scientists, 2025

The Escalation Spiral operates through technical change outpacing institutional adaptation. The 15-minute warning time provided by ICBM trajectories allowed the institutional crisis management infrastructure to function: leaders could be awakened, advisors consulted, hotlines activated, and decisions made with human deliberation. Hypersonic delivery systems compress that window to 3 minutes or less — below the threshold of meaningful human crisis management.

Cyber weapons add a second dimension. Nuclear command and control systems are increasingly networked, creating potential attack surfaces for adversaries seeking to disable, spoof, or compromise launch decision infrastructure. A cyber attack that compromises early warning systems could trigger a launch-on-warning posture based on false information. This risk exists without any treaty framework to restrict or verify the relevant cyber capabilities.

The Escalation Spiral is self-reinforcing: each side's nuclear modernisation — justified by the other's — creates new delivery systems outside existing frameworks, which provides justification for further modernisation. Without a verification framework to constrain or even document this process, it accelerates. The absence of New START removes the only brake.

Intersection

Institutional Decay removes the crisis management infrastructure that arms control was designed to maintain. Escalation Spiral produces the new technical systems — hypersonic, cyber — that the expired institutional frameworks were not designed to address. The intersection is a structural gap: the fastest-moving threat dimensions (hypersonic, cyber) have zero arms control governance, at the moment when the broader oversight framework (New START) has also expired. The gap is cumulative.

Pattern History

1962: Cuban Missile Crisis — What Happens Without Crisis Management Infrastructure

The Cuban Missile Crisis is the historical proof of concept for why arms control infrastructure matters. Thirteen days in October 1962 produced the closest recorded approach to nuclear exchange — not because either Kennedy or Khrushchev wanted war, but because both sides lacked the communication and verification frameworks to prevent miscalculation.

The crisis was resolved through improvised back-channels: a direct communication between Kennedy's brother Robert and Soviet Ambassador Dobrynin, a back-channel through ABC journalist John Scali, and a final deal that required both sides to accept ambiguous terms neither side could verify. It worked by accident.

The institutional response — SALT I (1972), the hotline (1963), and the subsequent treaty architecture — was specifically designed so that nuclear crisis management never had to be improvised under 13-day time pressure again. That lesson cost 13 days of near-catastrophe to learn. It is now being unlearned.

Structural similarity: The post-New START environment recreates the information opacity and institutional vacuum that made the Cuban Missile Crisis possible — with the addition of hypersonic weapons that compress decision time below 13 days to 3 minutes

1983: Able Archer 83 — When Intelligence and Institutional Failure Almost Triggered Nuclear War

In November 1983, NATO ran a realistic nuclear war exercise called Able Archer 83. Soviet intelligence, which had been tracking NATO exercise patterns for years and was expecting a nuclear first strike, nearly concluded the exercise was cover for an actual attack. Soviet nuclear forces were placed on alert. The world came within days of nuclear exchange — not because either side wanted war, but because each side's intelligence assessment of the other's intentions was wrong.

The Able Archer crisis was resolved only because a Soviet double agent, Oleg Gordievsky, reported the Soviet alert to British intelligence, which alerted the Reagan administration — which then modified its exercise conduct to reduce Soviet alarm.

The resolution required a spy with access to Soviet decision-making at the moment of maximum danger. Without verification frameworks that provide routine transparency about each side's capabilities and intentions, crisis management rests on intelligence access that cannot be guaranteed.

Structural similarity: Institutional opacity about adversary intentions — not deliberate aggression — is the primary nuclear war risk; the New START expiration recreates the opacity conditions of 1983 without a Gordievsky equivalent to provide back-channel clarity

The Pattern History Shows

The historical record is unambiguous: nuclear crises are driven not by deliberate aggression but by miscalculation under conditions of opacity. Arms control treaties reduce opacity, create shared information environments, and provide institutional frameworks for crisis communication. Their absence recreates the conditions that have historically produced near-misses. The Cuban Missile Crisis and Able Archer 83 are not ancient history — they are the design specifications for the infrastructure that just expired.

What's Next

Base case (Probability: 55-65%)

No successor to New START is negotiated in 2026–2027. Both sides continue nuclear modernisation without verified limits. Crisis management relies on the hotline and intelligence channels — no formal framework. China's nuclear expansion continues outside all frameworks. The risk of miscalculation-driven incident is elevated at margins — particularly around hypersonic test events and cyber incidents affecting nuclear command infrastructure — but no crisis escalates to the threshold of nuclear use.

Investment/Action Implications: Nuclear security risk premium should be embedded in tail risk models. Physical assets and geographic diversification as portfolio hedges.

Bull case (Probability: 10-15%)

A U.S.-Russia bilateral agreement — possibly as a side element of Ukraine peace talks — produces an interim nuclear risk reduction framework: mutual notification of hypersonic tests, restoration of some inspection access, and a moratorium on certain destabilising systems. China is excluded but not actively opposed. A formal New START successor process begins.

Investment/Action Implications: Significant geopolitical risk premium compression. Watch for early signals: bilateral working group establishment, mutual test notification exchanges.

Bear case (Probability: 25-30%)

A hypersonic test by Russia is misidentified by U.S. early warning systems as a potential attack. Without a verification framework or established communication protocol for hypersonic tests, the response protocol generates a 3-minute decision window. Senior leadership is either unavailable, the protocol fails, or the decision chain produces a launch-on-warning response based on false information. The probability of this specific scenario is low — but it is now structurally possible in a way it was not under New START.

Investment/Action Implications: This is the fundamental nuclear tail risk. No conventional financial hedge addresses this. The primary implication is for policymakers, not investors.

Triggers to Watch

• Hypersonic test misidentification incident: Any event where an adversary's hypersonic test is initially classified as a potential attack — generating a response protocol activation — demonstrates the concrete risk of the verification gap
• Cyber incident affecting nuclear command: A confirmed cyber intrusion into nuclear command and control infrastructure would force both sides to reassess the stability of deterrence without verification frameworks
• Russian or U.S. declaration of New START limits non-binding: If either side publicly declares it is no longer constrained by New START limits — even informally — it signals the beginning of unconstrained competition
• China crossing 600 operational warhead threshold: When China reaches rough strategic parity with officially-declared U.S. and Russian 'deployed strategic' warhead counts, trilateral arms control becomes unavoidable as a policy question

What to Watch Next

Next trigger: The first un-notified test launch of a new strategic system, such as a Russian Sarmat ICBM or a U.S. Sentinel ICBM, expected within the next 6-12 months.

Next in this series: The Tripolar Nuclear Dilemma: How China's Arsenal Changes the Logic of Deterrence

Sources:

• The Hill: Trump is betting the farm on intuition — and the nuclear clock is ticking
• Bulletin of the Atomic Scientists: Nuclear Notebook 2025