Nuclear War

Geopolitical tensions, particularly involving nuclear-armed states like Russia, the United States, and China, are at a critical juncture. Ongoing conflicts and strategic rivalries increase the risk of miscalculation or escalation leading to nuclear exchange. The immediate devastation, followed by nuclear winter and global famine, would cause civilizational collapse. While other threats exist, nuclear war presents the most probable and near-term existential risk based on current trends.