First there were the elder gods, who grew utterly sick of conflicting with themselves. So in their sandbox they created a representative race against which their influence would be tested. Things definitely did not go as planned. The gods then created the beings known today as AEtherials and placed them among the humans to nudge them toward the "proper" course watch and protect.
And the humans,
used to being total wusses being of a naturally more sensitive disposition, were unduly traumatized and plagued by these. So the gods then banished the latter to the AEther until they learned to behave themselves interact with the humans in a less traumatic fashion. Millenia later, we're still working on this.
Just something I've been working on for a rather long time. I like where this is going, and I must finish this.