Messiah (Unabridged‪)‬

In the aftermath of World War II, a funeral home mortician by the name of John Cave has a revelation about the nature of death: Death is peace; death is nothing to be feared. This simple concept will evolve into an atheistic religion known as Cavism, which will displace Christianity as the dominant western faith. But Cavism has a dark past, and even more ominous future.

Messiah was first published in 1954 by Gore Vidal under the pseudonym Edgar Box.