The announcement of the expiration of the nuclear arms treaty between the United States and Russia has come at an incredibly critical time, prompting urgent concerns from UN Secretary-General António Guterres. He has called upon both nations to swiftly negotiate a new agreement, labeling this moment as a "grave moment for international peace and security."
The previous treaty, known as the New Start agreement, officially ended on Thursday. This development has lifted numerous restrictions that had previously governed the nuclear capabilities of both Moscow and Washington, resulting in widespread anxiety about a potential resurgence of a global arms race.
Guterres highlighted a significant point: "For the first time in over fifty years, we are now facing a world devoid of any legally binding limitations on the strategic nuclear arsenals controlled by the two countries that hold the vast majority of the world’s nuclear weapons." In a statement made on Wednesday, he emphasized how the New Start agreement and similar treaties have greatly enhanced the safety of people worldwide.
He warned, "The dissolution of decades of progress could not occur at a more perilous moment—today, the likelihood of a nuclear weapon being deployed is at its highest level in decades," a reference influenced by earlier Russian threats to use tactical nuclear weapons during the Ukraine conflict.
Together, the United States and Russia account for over 80% of all nuclear warheads globally. Guterres appealed for a prompt return to the negotiating table, urging both nations to establish a successor agreement without delay. This milestone marks a dire turning point for over fifty years of arms control amid rising global uncertainties, which could also jeopardize the upcoming review of the 1970 Nuclear Nonproliferation Treaty (NPT). Under the NPT, non-nuclear states committed to abstaining from acquiring nuclear weapons, contingent upon the nuclear-armed states making sincere efforts toward disarmament.
The New Start treaty, which was signed in 2010 in Prague by then-presidents Barack Obama and Dmitry Medvedev, imposed a cap of 1,550 deployed strategic warheads for each side—a nearly 30% reduction from the previous limit established in 2002. Following the treaty's expiration, Medvedev expressed alarm, stating that it should concern everyone involved. Obama took to social media to warn that this lapse could ignite a new arms race, ultimately making the world a less secure place.
After defeating Donald Trump in the 2020 presidential election, Joe Biden agreed with Russia to extend the New Start treaty for another five years; however, relations soured significantly following Russia's invasion of Ukraine. Trump's administration had often criticized international restrictions on the U.S. and even suggested resuming nuclear testing after a prolonged moratorium, although he did not take further action on this matter.
Some analysts believe that the end of New Start is less about differing ideologies and more about the dynamics within the Trump administration, where experienced diplomats were often sidelined, lacking the capacity to negotiate such complex agreements. Trump did not pursue Russian President Vladimir Putin’s suggestion to extend the treaty for an additional year. When asked about it in October, Trump acknowledged that it sounded like a reasonable idea, yet no negotiations followed.
On Wednesday, the Russian foreign ministry stated that both nations now consider themselves free from any obligations or symmetrical declarations regarding the treaty. They added that while the Russian Federation intends to act responsibly, it is prepared to take necessary countermeasures should its national security be jeopardized.
Pope Leo XIV also weighed in, urging both sides to do "everything possible" to prevent a renewed arms race. He implored them not to abandon the treaty without ensuring that there is a concrete and effective follow-up plan in place during his weekly address.
In a related statement, U.S. Secretary of State Marco Rubio indicated that Trump would reach a decision in due course and reiterated the importance of establishing a new agreement that incorporates China. "The president has been clear that genuine arms control in the 21st century is impossible without including China, given their extensive and rapidly expanding nuclear stockpile,” stated Rubio.
Currently, China is significantly increasing its nuclear arsenal, possessing an estimated 550 strategic nuclear launchers, though this number still falls short of the 800 warheads capped by both Russia and the U.S. under the New Start framework. France and the United Kingdom, both allies of the U.S. bound by the treaty, together maintain an additional 100 warheads.
This situation raises critical questions: What does the future hold for global nuclear stability? How will these developments affect international relations moving forward? We invite you to share your thoughts and opinions in the comments.
