Religious event
When the world was formed and created, Solun felt the need to have more children in the world and so he created mortality beginning with the Elves, then on to the Dwarves and finally the Humans
And lo, thus were mortals introduced into Unorrea in the Dawn of Time, first the Elves, then the Dwarves, then Men. And each were given the Gift of Solun, which is to say the Gift of Creation. And each created works according to their wills and personalities.- Advent 4:1