Global catastrophic risk
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A global catastrophic risk or a doomsday scenario is a hypothetical event that could damage human well-being on a global scale, endangering or even destroying modern civilization. Existential risk is
Artist's impression of a major asteroid impact. An asteroid caused the extinction of the non-avian dinosaurs.
Human extinction
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Human extinction, or omnicide, refers to the possible ending of the human species, either by population decline due to singular natural events—for example, space irradiation, asteroid impact, or large
Global catastrophic risk
…a global scale, endangering or even destroying modern civilization. Existential risk is a related term limited to events that could cause full-blown human extinction or permanently and drastically curtail humanity's existence or potential. In the 21st century, a number of academic and non-profit organizations have…
Nuclear war is an often predicted cause of the extinction of humankind.
Castle Romeo nuclear test on Bikini Atoll
Placard against omnicide, at Extinction Rebellion (2018)