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Climate Catastrophe
Based on accelerating global trends, the most likely world-ending scenario is a cascading climate catastrophe driven by unchecked environmental degradation. Rising temperatures, extreme weather events, and biodiversity loss—exacerbated by geopolitical inaction and societal denial—could trigger tipping points like melting ice caps and permafrost thaw, releasing massive greenhouse gases and causing sea-level rise that displaces billions.
This would lead to widespread famine, resource wars over water and arable land, and societal collapse as infrastructure fails under heatwaves, floods, and storms. Technological efforts like geoengineering might backfire, worsening imbalances. Without drastic emission cuts, by mid-century, habitability zones shrink, potentially extinguishing human civilization through interconnected environmental, economic, and conflict-driven failures.
This would lead to widespread famine, resource wars over water and arable land, and societal collapse as infrastructure fails under heatwaves, floods, and storms. Technological efforts like geoengineering might backfire, worsening imbalances. Without drastic emission cuts, by mid-century, habitability zones shrink, potentially extinguishing human civilization through interconnected environmental, economic, and conflict-driven failures.