• Carrington event or large solar storm
• Nuclear war
• Climate change
• Global economic collapse
• Food shortages
• Global pandemic
• Human caused electromagnetic pulse
• Self replicating nanobots. 'Grey Goo'
• Artificial intelligence turns on humanity
• Disruption of the power grid or banking system
• Escaped genetically engineered organisms
• Deliberate culling of the population by global elites
• Alien invasion
• Asteroid strike
• Super volcano eruption
• Over population
• As of yet unknown risks
• Other

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• Within a few years
• Within 10 years
• Within 50 years
• Within 100 years
• Within 200 years
• Within 500 years
• More than 500 years from now

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• Certainly
• Almost certainly
• Very likely
• Likely
• Unlikely
• Very unlikely
• Far fetched

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