Climate Collapse

The most probable path to civilizational collapse is through cascading climate failure. Accelerating global heating triggers irreversible tipping points—such as the loss of Arctic ice, permafrost thaw, and Amazon dieback—that lock in severe warming. This leads to simultaneous global breadbasket failures from extreme droughts, floods, and heatwaves, causing systemic food and water crises. Widespread crop failure drives mass migration, economic destabilization, and conflict over dwindling resources.

These environmental shocks compound existing geopolitical tensions and social inequalities, overwhelming international cooperation and institutional capacity. The resulting feedback loops—societal breakdown hindering coordinated climate action—accelerate the crisis. While nuclear war or AI alignment present catastrophic risks, the persistent, multi-decade failure to mitigate emissions makes climate collapse the most likely ultimate cause, unfolding gradually yet unstoppably toward large-scale civilizational failure.