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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 ".
Virulence is instead limited by the existence of complex populations of hosts with different susceptibilities to infection, or by some hosts being geographically isolated. [167] The size of the host population and competition between different strains of pathogens can also alter virulence. [171]
Doomsday scenarios are possible events that could cause human extinction or the destruction of all or most life on Earth (a "true" or "major" Armageddon scenario), or alternatively a "lesser" Armageddon scenario in which the cultural, technological, environmental or social world is so greatly altered it could be considered like a different world.
2021 United States Capitol car attack: On 2 April 2021, a car ramming occurred outside the United States Capitol, killing a police officer and injuring another. Police shot and killed the perpetrator shortly after. Killing of Deona M. Knajdek: A driver killed one person and injured three on June 13, 2021, in the U.S. city of Minneapolis.
"Since its creation in 1947, the Doomsday Clock has been adjusted only 18 times, ranging from two minutes before midnight in 1953 to 17 minutes before midnight in 1991," said BAS.
Many hypothetical doomsday devices are based on salted hydrogen bombs creating large amounts of nuclear fallout.. A doomsday device is a hypothetical construction — usually a weapon or weapons system — which could destroy all life on a planet, particularly Earth, or destroy the planet itself, bringing "doomsday", a term used for the end of planet Earth.
Doomsday may refer to: Eschatology , a time period described in the eschatological writings in Abrahamic religions and in doomsday scenarios of non-Abrahamic religions. Global catastrophic risk , a hypothetical event explored in science and fiction where human civilization or life is at risk of partial or complete destruction.
[2] In the form of a top ten list, a set of doomsday scenarios—disasters that have the capacity to wipe out our species—is examined scientifically. The first part deals with threats to humanity from nature's violent forces. The second part deals with various threats that human society has created. [3] [4]