If, in the next 50 years, Human pop. drops to 500m or less, or humans go extinct, what is the most likely cause?
7
2076
Nuclear war or global thermonuclear conflict
Engineered pandemic or runaway biological weapon
Uncontrolled Artificial General Intelligence (AGI)
Climate change leading to collapse of civilization
Natural global catastrophe (asteroid, supervolcano)
Nanotechnology-based 'gray goo' disaster
Resource depletion and total economic collapse
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