There are at least three popular explanations for how the islands came to be (many current residents of Auri even doubt that their world ever was a single connected planet):
1. The many gods fought a disastrous battle and unleashed their powers on the land, causing founts of fire and trembling earth to rend the earth in two
2. The ancients that came long ago (possibly even a race or races that no longer exist) developed too much power and technology and destroyed the earth
3. Finally, there is something of a reverse myth: the world has always been islands, but once a number of mysterious steps or omens have taken place, the world will be united as a whole