Wald predicted that “civilization will end within 15 or 30 years unless immediate action is taken against problems facing mankind
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Wald predicted that “civilization will end within 15 or 30 years unless immediate action is taken against problems facing mankind
Text from Wikipedia, available under CC BY-SA 4.0.
Captured 2026-08-18 from Wikipedia. The archived copy is preserved so this citation survives link rot.