Climate Collapse

The most probable cause of a global societal collapse is runaway climate change. Current scientific consensus and observed trends indicate that warming is accelerating beyond many optimistic projections, driven by cumulative greenhouse gas emissions and feedback loops like permafrost thaw. This would trigger catastrophic, interrelated failures in human systems: severe food and water shortages from extreme weather and destabilized agriculture; mass displacement and migration from submerged coastal areas and uninhabitable regions; and resulting resource conflicts and geopolitical strife.

While other risks like advanced AI or engineered pandemics exist, their pathways to total global termination are less direct and more speculative. Climate collapse, however, operates on well-understood physical principles and has a long-standing, observable trajectory. It acts as a threat multiplier, exacerbating every other existing stressor until critical global networks for food, trade, and governance break down, leading to a cascading collapse of international civilization rather than a single, instantaneous extinction event.