In February 1832, in Hiram, Ohio, Joseph Smith and Sidney Rigdon reported a joint vision that Latter-day Saints call simply 'the Vision' and canonize as Doctrine and Covenants 76. What it did was dismantle the binary. Instead of saved and damned, it described three kingdoms of glory, each real, each permanent, and each incomparably better than the world — with a narrow category of outer darkness reserved for those who had full knowledge and turned on it anyway. Rigdon reportedly said afterward that the Lord had shown it to him; Smith replied that he could not have borne it if he had not seen it too. Contemporaries found it shocking, and some early converts left over it, because it read as a doctrine that almost nobody goes to hell.
The sequence begins before the resurrection. At death the spirit enters the spirit world, divided into paradise and spirit prison, but the boundary is porous by design: the gospel is preached to those in prison, and they may accept it there. This is the doctrinal ground for the practice that most distinguishes the church in the outside world — proxy baptism for the dead, performed in temples for ancestors identified by name. It is why Latter-day Saints built and maintain the largest genealogical archive on earth. The logic is strict: an ordinance must be performed in a body, so the living lend theirs; the dead remain free to accept or refuse.
At the resurrection, everyone receives a body, and the kingdoms are assigned. The celestial, compared to the glory of the sun, is for those who received the gospel and its covenants; there God dwells, and there the doctrine of exaltation applies — the promise that the faithful may continue to progress, that families sealed in the temple continue as families, and, in the most audacious teaching of the tradition, that human beings may become as God is. The terrestrial, compared to the moon, is for the honorable who did not receive the fullness. The telestial, compared to the stars, is for the wicked, and even it is described as a glory surpassing understanding. Outer darkness holds only the sons of perdition, and the tradition is deliberately vague about how few that is.
What makes the framework distinctive in a comparative atlas is the direction of its generosity. Most judgment systems sort into a good outcome and a bad one and then argue about the proportions. This one very nearly abolishes the bad outcome while keeping a strenuous, ordinance-heavy path to the highest one — and then reopens the entire process to the dead, indefinitely, through the work of their descendants. Heaven becomes a matter of degree, hell becomes a rounding error, and salvation becomes something a family does together across generations rather than something an individual settles alone at the moment of death.