the.com/eschatology

The study of how everything ends, written by people confident they know.

means The branch of theology concerned with final things — death, judgment, and the ultimate destiny of the world.

from From Greek 'eschatos,' meaning 'last' or 'furthest,' joined with '-logia,' 'study of.' The word itself was coined relatively recently, in the 1800s, to give a tidy academic label to something humans had been anxiously speculating about since they first noticed the sun doesn't last forever.

etymology
Greek eschatos, meaning last or furthest
scope
covers death, judgment, heaven, and apocalypse
irony
every predicted end date has, so far, been wrong
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