An (un)believable apocalypse

For a very long time, I’ve had a vague idea about writing (or “telling”) a sort of apocalypse story. Not post-apocalyptic, but of an apocalypse, a story about the world directly before and during its end. But I also say “sort of” because—I suppose like many post-apocalyptic narratives—the world doesn’t actually end. The world as we know it ends; the world and its inhabitants undergo dramatic change, the rules change. So to be more precise, I want to tell a story about the events leading up to the world-as-we-know-it falling apart, then paint the epic beauty that is that falling apart.