Nuclear Escalation

Among technology, environment, geopolitics, and society, the most probable path to global catastrophe is a nuclear war triggered by miscalculation, escalation, or accidental launch. Climate change is severe but slower-moving; AI and biotechnology pose major risks but remain harder to forecast; pandemics are recurrent but less likely to end civilization outright. Nuclear weapons combine immediate destructive power with long-term climatic and agricultural collapse.

Geopolitical tensions among nuclear-armed states, the erosion of arms-control agreements, modernization of arsenals, and rising conflict risks in multiple regions increase the chance of escalation. Cyberattacks, missile-warning errors, hypersonic weapons, and AI-assisted decision-making could compress response times and raise the risk of accidental war. Even a limited nuclear exchange could ignite firestorms, inject soot into the atmosphere, trigger nuclear winter, collapse food production, and cause global societal failure.