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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, [2] even endangering or destroying modern civilization. [3] An event that could cause human extinction or permanently and drastically curtail humanity's existence or potential is known as an " existential risk ".
Scenarios in which a global catastrophic risk creates harm have been widely discussed. Some sources of catastrophic risk are anthropogenic (caused by humans), such as global warming, [1] environmental degradation, and nuclear war. [2] Others are non-anthropogenic or natural, such as meteor impacts or supervolcanoes.
Gray goo (also spelled as grey goo) is a hypothetical global catastrophic scenario involving molecular nanotechnology in which out-of-control self-replicating machines consume all biomass (and perhaps also everything else) on Earth while building many more of themselves, [1] [2] a scenario that has been called ecophagy (the literal consumption of the ecosystem). [3]
Global Catastrophic Risks is a 2008 non-fiction book edited by philosopher Nick Bostrom and astronomer Milan M. Ćirković. The book is a collection of essays from 26 academics written about various global catastrophic and existential risks .
A shocking new report on global biodiversity is detailing what it calls "a catastrophic decline" in wildlife populations ahead of a major international conference on biodiversity.
A plausible and significant contributor to global catastrophic risk; the potential for climate change to be a global catastrophic threat can be referred to as "catastrophic climate change". Global decimation risk: The probability of a loss of 10% (or more) of global population and the severe disruption of global critical systems (such as food ...
The conflict will pose risks to the global economy, widen geopolitical and political divisions, and stoke global extremism. The straightest path to escalation would be a decision by either Israel ...
An existential risk is "a risk that threatens the destruction of humanity’s longterm potential", [8]: 59 including risks which cause human extinction or permanent societal collapse. Examples of these risks include nuclear war , natural and engineered pandemics , climate change and civilizational collapse , stable global totalitarianism , and ...