Global Security Shift as U.S.–Russia New START Treaty Expires

 

Today marks a historic turning point in global nuclear diplomacy as the New START treaty — the last remaining nuclear arms control pact between the United States and Russia — officially expires. This treaty, in force since 2011, has been a cornerstone of post–Cold War arms control, limiting the two largest nuclear arsenals in the world.

The expiration has drawn concern from global leaders and experts alike due to its implications for international security and the risk of a renewed arms race.

🔐 What the New START Treaty Was

The New Strategic Arms Reduction Treaty (New START) was first signed in 2010 and put into effect in 2011. It capped each side’s number of deployed strategic nuclear warheads and delivery systems — a verification mechanism that helped ensure transparency between rivals that once stood on the brink of nuclear confrontation.

Under the treaty:

• The U.S. and Russia were limited to 1,550 deployed nuclear warheads each.

• Regular on-site inspections and data exchanges were maintained.

• The treaty acted as a symbol of cooperation amid broader geopolitical tensions.

🧨 Why Its Expiration Matters

With the treaty’s expiration:

• There are no legally binding limits on U.S. and Russian nuclear arsenals for the first time in over 50 years.

• Transparency and verification measures that helped reduce mistrust are now gone.

• Experts warn this could spur a new nuclear arms buildup or reduce incentives for diplomacy.

United Nations Secretary-General António Guterres described this moment as a “grave moment for international peace and security.” He called on both nations to return to negotiations quickly and pursue a new framework appropriate for today’s strategic environment.

🇷🇺 Russia’s Response

The Kremlin acknowledged the treaty’s expiration and stated it would continue to act as a responsible nuclear power, even as the agreement lapses. Russia had previously suggested a voluntary one-year extension, but the U.S. did not formally accept that offer. 

Written by LifeScope News Editorial Desk. We cover global politics, business, and social issues with context and analysis.