![]() Later philosophers such as Al-Ghazali, William of Ockham, and Gerolamo Cardano expanded the study of logic and probability and began discussing abstract possible worlds, including a world without humans. Ancient Western philosophers such as Plato, Aristotle, and Lucretius wrote of the end of humankind only as part of a cycle of renewal. The principle traces back to Aristotle, and was an important tenet of Christian theology. It contradicted the principle of plenitude, a doctrine that all possible things exist. History of thought Early history of thinking about human extinction īefore the 18th and 19th centuries, the possibility that humans or other organisms could become extinct was viewed with scepticism. The likelihood of human extinction through humankind's own activities, however, is a current area of research and debate. The scientific consensus is that there is a relatively low risk of near-term human extinction due to natural causes. ![]() Other scenarios center on emerging technologies, such as advanced artificial intelligence, biotechnology, or self-replicating nanobots. Human extinction is the hypothetical end of the human species due to either natural causes such as population decline from sub-replacement fertility, an asteroid impact, large-scale volcanism, or to anthropogenic (human) causes.įor the latter, some of the many possible contributors include climate change, global nuclear annihilation, biological warfare, and ecological collapse. Nuclear war is an often-predicted cause of the extinction of humankind.
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