NextFin News - The global security architecture governing nuclear weapons officially entered an era of unprecedented uncertainty on February 5, 2026, as the New Strategic Arms Reduction Treaty (New START) between the United States and Russia expired. For the first time since the early 1970s, the two nations that possess more than 80% of the world’s nuclear warheads are no longer restricted by legally binding limits on their strategic arsenals. According to the Stockholm International Peace Research Institute (SIPRI), the treaty’s lapse removes the cap of 1,550 deployed warheads and 700 deployed delivery vehicles, such as intercontinental ballistic missiles (ICBMs) and heavy bombers, that had maintained a semblance of strategic balance for over a decade.
U.S. President Trump, who was inaugurated on January 20, 2025, has consistently characterized the 2010 agreement as a "bad deal" negotiated by the Obama administration and extended by the Biden administration. On February 5, Trump stated on social media that the U.S. should instead focus on a "new, improved, and modernized" treaty that reflects current geopolitical realities. The primary point of contention remains the inclusion of China. U.S. Secretary of State Marco Rubio emphasized that arms control is "impossible" without Beijing, citing the rapid expansion of China’s nuclear stockpile, which is estimated to have reached 600 warheads. However, the Chinese Ministry of Foreign Affairs, through spokesperson Lin Jian, rejected these calls, noting that China’s arsenal remains on a "totally different scale" compared to the thousands of warheads held by Washington and Moscow.
The collapse of the treaty follows years of deteriorating relations. Russia had already suspended its participation in 2023, citing U.S. support for Ukraine, though it initially pledged to respect the numerical limits. With the formal expiration, the Kremlin has indicated it no longer considers itself bound by those caps. Russian President Vladimir Putin had previously proposed a one-year voluntary adherence to the treaty’s limits to allow for negotiations, but the Trump administration has shown little interest in maintaining the status quo. United Nations Secretary-General Antonio Guterres described the situation as a "grave moment," warning that the risk of nuclear weapon use is at its highest level in decades.
From a strategic perspective, the expiration of New START signifies more than just the end of numerical limits; it marks the death of the verification and transparency regime. Under the treaty, both sides were permitted up to 18 on-site inspections per year and exchanged data on the status and location of their nuclear forces. Without these mechanisms, military planners in Washington and Moscow will be forced to rely on "worst-case scenario" assumptions. This lack of visibility is a classic driver of arms races, as each side overcompensates for the perceived, rather than verified, capabilities of the other. SIPRI data suggests that even before the treaty’s end, global warhead counts were beginning to trend upward after decades of decline, with approximately 12,250 warheads currently in existence worldwide.
The insistence by Trump on a trilateral framework including China introduces a complex "three-body problem" into nuclear diplomacy. While the U.S. views China’s projected growth to 1,500 warheads by 2035 as a threat that must be capped now, Beijing views its expansion as a necessary deterrent against a technologically superior U.S. missile defense system. Russia, meanwhile, has conditioned its participation in any multilateral talks on the inclusion of U.S. allies France and the United Kingdom, further complicating the path to a successor agreement. This deadlock suggests that a formal treaty is unlikely in the near term, leaving the global community in a prolonged period of "unconstrained nuclear competition."
The broader impact on the Non-Proliferation Treaty (NPT) cannot be overstated. The NPT is built on a grand bargain: non-nuclear states agree not to acquire weapons in exchange for a commitment from nuclear states to pursue disarmament. As the two largest powers abandon their commitments, the moral and legal leverage to prevent countries like Iran or Saudi Arabia from pursuing their own nuclear ambitions is severely weakened. If the U.S. and Russia begin to significantly expand their deployed forces—which they can now do by simply "uploading" stored warheads onto existing missiles—the global non-proliferation regime may face a total collapse.
Looking ahead, the most likely trend is a shift toward "integrated deterrence" and technological competition rather than traditional arms control. The U.S. is already in the midst of a $1.5 trillion modernization of its nuclear triad, and the absence of treaty constraints will likely accelerate the development of hypersonic delivery vehicles and autonomous command-and-control systems. While the Kremlin and the White House have agreed that "quick arms talks" are needed, the fundamental lack of trust and the divergent goals of the U.S., Russia, and China suggest that any new framework will be less about reduction and more about managing a permanent state of high-alert competition. The world has moved from the bilateral stability of the Cold War into a fragmented, multipolar nuclear era where the rules of the road have yet to be written.
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