The world is on the brink of a grave moment as the expiration of the US-Russia nuclear pact, known as New Start, marks a significant setback for global peace and security. This pivotal treaty, which ended on February 3rd, 2026, has been a cornerstone of nuclear arms control for over five decades. With its demise, the international community faces a daunting challenge: the absence of binding limits on the strategic nuclear arsenals of the two nations that possess the overwhelming majority of the world's nuclear weapons. This is a stark reminder of the delicate balance of power and the potential consequences of a lack of restraint in the nuclear arena.
The New Start agreement, signed in 2010 by Presidents Barack Obama and Dmitry Medvedev, set a limit of 1,550 deployed strategic warheads for each side, a substantial reduction from the previous limit of 2002. This treaty has been instrumental in improving global security, as Guterres emphasized, stating that it has "drastically improved the security of all peoples."
However, the expiration of New Start coincides with a time of heightened global instability and a soaring risk of nuclear conflict. The world is witnessing the tragic conflict in Ukraine, where Russia's initial use of tactical nuclear weapons has raised alarm bells. With Russia and the US controlling over 80% of the world's nuclear warheads, the potential for a devastating arms race is a very real concern. The 1970 Nuclear Non-Proliferation Treaty (NPT), which is set for review this year, could be at risk, as states without nuclear weapons may feel compelled to acquire them if the nuclear-armed states fail to disarm.
The situation is further complicated by the political landscape. President Joe Biden, in a strategic move, agreed to extend New Start for five years after his 2020 election victory. However, tensions escalated with Russia's invasion of Ukraine, casting doubt on the treaty's longevity. Donald Trump, a former presidential candidate, has been vocal about his opposition to international nuclear limits and has called for the resumption of nuclear testing, though no concrete actions have followed. The Trump administration's approach to diplomacy, where career diplomats are sidelined, may have contributed to the treaty's expiration, as it lacked the necessary bandwidth to negotiate a complex agreement.
The Russian Foreign Ministry's statement on Wednesday was a clear indication of their stance, asserting that both countries are no longer bound by the treaty's obligations. Despite this, Russia pledged to act responsibly and prudently, but also warned of decisive countermeasures if its national security is threatened. The situation is a delicate balance, and the international community must act swiftly to prevent a new arms race.
The Pope, Leo XIV, urged both sides to make every effort to prevent a new arms race, emphasizing the importance of ensuring a concrete and effective follow-up to the treaty. The US Secretary of State, Marco Rubio, echoed this sentiment, calling for a new agreement that includes China, whose rapidly growing nuclear arsenal poses a unique challenge. With China's estimated 550 strategic nuclear launchers, the need for a comprehensive global nuclear arms control strategy has never been more apparent.
As the world grapples with this grave moment, it is crucial to recognize the potential consequences of inaction. The expiration of New Start is not just a diplomatic setback; it is a threat to the very fabric of international peace and security. The international community must come together to address this challenge, ensuring that the world does not descend into a new era of nuclear arms racing.
