The Slow Decline

Maverot is a world in ultimate collapse; old things pass away, and nothing new is created. It isn't only memories that die here.
Many species of animal were unable to adapt to the smothering darkness after the Starvation. Horses in particular were vulnerable to the stress of it. Most died of heart failure after only a few months. The rest were eaten, either by monsters or by desperate survivors. Most livestock left now are swine, goats, and chickens. Here and there other animals may be found, but more vanish each day.
All disciplines both academic and arcane waste away. As those who knew them die, their memories are lost and the spellbooks and historical texts they leave behind become useless, for who can read them? All divine casting ended with the Starvation. No longer do the gods answer the prayers of mortal servants. Strangely enough, foreigners from other worlds who end up on Maverot may still cast by the power of their patron, but sometimes experience interference from conditions on Maverot.
As if the slow extinction of both native wildlife and knowledge wasn't enough, sapient creatures on Maverot no longer reproduce. Though livestock and other wildlife still seem capable of procreation, all the mortal races of men no longer bear children. No one knows why, and many don't remember there were ever children at all. Though still able to have relations, these joinings never produce offspring. Instead, when a Maverotian dies, they reawaken an indeterminate amount of time later somewhere else on the world in a new body that looks exactly like the old. Where the body comes from, no one knows. No one has ever witnessed the moment of reincarnation, though many have tried. In this fashion the population of Maverot remains mostly stable, though sometimes someone dies and simply stays dead.