eschaton

noun2

1. •
   The apocalypse; the approach of Christ’s reign immediately preceding the end of the world; a conception of or circumstance pertaining to this era.

   • Only in the eschaton will God’s purpose gain its final fulfilment, a fulfilment, be it noted, which may still include some form of movement within a time-series. — 1953
2. •
   An end or fulfilment of history in general.

   • He, too, constructs a philosophical history towards an eschaton. In a peculiarly inverted manner he is among the believers in progress—the goal being the undoing of the things done. — 1949