The Cataclysm: technically a planetary extinction event occurring over thousands of years, but the date schoolchildren learn for the Cataclysm is when There are actually multiple "Earths." Thanks to an accident of magic and quantum physics, the world was split into parallels... More reached one hundred percent uninhabitable status for carbon-based life.
It wasn’t actually a fast process. There was, in fact, warning; that warning is part of what led to six of the The Seven Peoples of the Earth are the seven identifying categories applied to most sentient beings in the world. More fleeing the The Ever-Dying are humans, so-called because – from the viewpoint of magical beings – they’re dying from the moment they’re... More home-world and creating their own parallel worlds: the The parallel world of the Fey. It’s colorful. More for the Fey; The Home to The People of the Dream, it’s considered an off-limits world. It’s asleep, so to speak; nothing happens there.... More for the the The Dream include any people who live between dimensions and subsist on the essence of dreams of others. More; The home of the Darkness. More for the The Darkness include any magical beings with a primary drive to devour or collect. More; The world of the People of the Sun. More for the The Sun include any magical beings with a primary drive and ability to heal. More.
Within those four worlds, all the magical peoples eventually managed to create strongholds (or at least make mutually beneficial deals). However, this balance then threatened when it became clear Earth was dying, and multiple billion humans all desperately needed help.
Through the efforts of human-friendly leaders like He’s one of the oldest living beings among the Mythos. The father of all vampires (or Night-Children, as they’re called),... More, Heir apparent to the Scepter and Jaden's nephew, Aiden is a special ball of sunshine. More, John Barron Grey, né John Barron MacCarrig, son of Owen MacCarrig, son of Leith of the Stone, son of Eithne... More, and His official titles are Prince of Umbra, Lord of Crows, Echelon of Darkness, and Heir to the Darkseed, and he... More, arrangements were made to provide sanctuary to many humans.
Not all. Not by a long shot. There simply wasn’t room – or so goes the claim.
In the end, the Ever-Dying humans were divided into three groups: the Those Ever-Dying who were offered rescue before the Cataclysm wiped out all life on Earth., who were taken into other worlds in various states from guests to slavery; the Those Ever-Dying who remained behind and suffered through the end of the world., who were left to die; and the The term used by the Association for humans - Ever-Dying - with no trace of magic in their blood., who were chosen by the Association to fly away from Earth and try to repopulate elsewhere – preferably someplace without any magic.