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Published: 1st September 2021

Citation: Astronist Institution. (2021). Extensivism. Available: Last accessed [enter date e.g. 1st Sept 2021].


noun  Astroeschatology

belief in the existence of extraterrestrial life but that due to the vast size of The Cosmos, humanity will either never discover or come into direct contact with such life.


Extensivist | ɛkˈ stɛnsɪvɪst | adjective & noun


Astro-English: from Astronese, the adjective extensive is used here in its primary sense to denote “vastness” which when adjoined to the suffix -ism denotes “a formalised belief” and in the context of the Astroeschatology, refers to the “belief that due to the extensive size of The Cosmos, there must, by way of probability, exist at least sentient if not also sapient extraterrestrial life.”

Encyclopaedic entry for “Extensivism” on

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