Nuclear Escalation

The most probable path to global catastrophe is a human-triggered nuclear conflict. Geopolitical tensions among nuclear-armed states remain high, arms-control frameworks have weakened, and modernization programs are expanding arsenals with faster, harder-to-track delivery systems. Regional conflicts involving nuclear powers or their allies create persistent risks of miscalculation, especially when combined with cyberattacks, misinformation, and AI-assisted decision-making that can compress response times.

Even a limited nuclear exchange could ignite firestorms, inject soot into the upper atmosphere, and cause nuclear winter. The resulting collapse in agriculture, supply chains, and public health could kill billions and destabilize civilization. Because nuclear weapons uniquely combine geopolitical volatility, technological error, and global environmental consequences, they remain the most likely single cause of the world ending.