Nobel Prize-winning physicist David Gross has warned that humanity may have only 35 years left due to the escalating risk of nuclear war. The estimate, based on a 2% annual probability of conflict, was shared in an interview with Live Science. Gross, who won the 2004 Nobel Prize in Physics, argued that the absence of nuclear arms-control treaties and rising geopolitical tensions—including conflicts in Europe, Iran, and between India and Pakistan—have heightened the danger.
Part 1: Immediate Action & Core Facts
Gross’s warning stems from his belief that the 1% annual risk of nuclear war during the Cold War has increased to 2% today. Using a model similar to radioactive decay calculations, he estimated a 35-year "lifespan" for humanity under this risk. He also noted the collapse of major nuclear treaties, including the New START treaty between the U.S. and Russia, which expired in February 2026.
Part 2: Deeper Dive & Context
Background on Gross’s Work
Gross, known for discovering asymptotic freedom in quantum physics, has shifted focus to existential risks. He recently received the $3 million Special Breakthrough Prize for his contributions to physics. His warning aligns with broader concerns about nuclear proliferation, as the number of nuclear-armed states has grown to nine, complicating arms control.
Global Tensions and Treaties
Gross highlighted renewed nuclear threats, including the war in Ukraine, Iran’s nuclear program, and near-conflicts between India and Pakistan. He criticized the lack of new arms-control agreements in the past decade, arguing that multipolar nuclear dynamics are more unstable than Cold War-era U.S.-Soviet tensions.
Criticism and Counterarguments
Some experts argue that Gross’s estimate is speculative, as nuclear risk models are inherently uncertain. Others point to diplomatic efforts to prevent escalation, such as the 2023 U.S.-Russia bilateral talks on strategic stability. However, no new treaties have been finalized, leaving the future of arms control uncertain.
Long-Term Implications
If Gross’s projection holds, the next three decades could see heightened efforts to renegotiate treaties or develop non-proliferation strategies. The warning also underscores the need for global cooperation amid rising geopolitical fragmentation.