The month-long war with Iran is dangerously colliding with a fragile global nuclear order, creating fears of a new era of nuclear proliferation.
The conflict began on February 28, 2026, with joint U.S.-Israeli strikes in Iran, which led to swift Iranian retaliation across the Gulf. This escalation immediately threatened the Strait of Hormuz, a critical chokepoint for global energy. As the U.S. launched an air campaign to reopen the strait, attacks on energy infrastructure, including a significant Qatari LNG facility, sent shockwaves through the markets. The oil proxy USO surged over 50%, demonstrating how a regional conflict can rapidly become a global economic problem.
This crisis is unfolding against a precarious backdrop. First, the last major U.S.-Russia arms control treaty, New START, expired just weeks before the war began. Without this legal framework, which capped the world's two largest nuclear arsenals, there are fewer safeguards to prevent miscalculation during a high-stakes military conflict. Russia has offered to voluntarily observe the limits for a year, but this informal arrangement lacks the verification and stability of a formal treaty, leaving the world on shakier ground.
Second, the risk of nuclear proliferation in the Middle East is higher than ever. The International Atomic Energy Agency (IAEA) has lost the ability to verify Iran's nuclear activities, creating an information vacuum. For Iran's neighbors, this uncertainty forces them to plan for the worst-case scenario. Saudi Arabia has long stated it would pursue a nuclear weapon if Iran did, and recent signals, like Pakistan offering a 'nuclear umbrella' to Riyadh, suggest these discussions are moving from theory to active policy consideration.
This regional tension is amplified by a wider trend of great-power rearmament. Reports confirm that China is rapidly expanding and modernizing its nuclear arsenal, while Russia continues its own upgrades. Compounding this, recent rhetoric from the U.S. about potentially resuming nuclear testing has weakened the global taboo against it. For U.S. allies, this combination of events raises questions about the reliability of American security guarantees, encouraging them to consider developing their own deterrents.
In short, the war in Iran is not just a regional conflict. It is a catalyst that is accelerating the breakdown of the global arms control architecture and fueling a dangerous cycle of proliferation. The IAEA's warning that more nuclear weapons will not make the world safer is becoming a stark reality.
- Glossary
- Strait of Hormuz: A narrow waterway between Iran and Oman, through which a significant portion of the world's oil supply passes.
- New START: A nuclear arms reduction treaty between the United States and Russia that limited the number of deployed strategic nuclear warheads and bombs. It expired in February 2026.
- IAEA (International Atomic Energy Agency): The world's central intergovernmental forum for scientific and technical co-operation in the nuclear field. It works to ensure the peaceful use of nuclear science and technology.