Humans from Asmiara are said to have descended from the supernatural races that call the planet home. It is believed that long ago the varies supernatural species gave birth to a large number of children with little to no magical abilities. Having powerless children was not a new concept to the supernatural races. They had many such children before this event and continued to have them long after it had passed. However, what made this event different from the other times' such children were born were the sheer number of powerless children brought into the world at the time.
There were those who believed that so many powerless children being born at once meant the loss of magic upon Asmiara, and believed that if something wasn't done that the magic would be completely gone from the planet in as little as a few decades. They didn't agree on how to prevent this from happening. Some believed that all they needed was to appease the goddess. They claimed that they are lost of magic was due to the fact that they had done something to displease her, and they will only gain it back if they made amend for their sins.
Others believed that the only way to regain the lost magic was to kill those born without it. They claimed that their world's magic was being absorbed---some even believed destroyed--by these powerless children, and believed killing the powerless children was the only way to prevent all their magic from being completely absorbed or even destroyed. It was an idea that spread like wildfire across the planet, and those powerless children either fought to defend themselves or fled for their lives. It eventually became clear that a large number of powerless children being born at the time had no direct connection to the magic upon Asmiara.
The varies races upon Asmiara welcomed the powerless back into their societies, but not every powerless were eager to walk back into the societies that had been so eager to destroy them not so long ago. There were those whose lack of eagerness had more to do with the future treatment of their kind rather than past treatment. They believed that no matter how open to the powerless these other races are they will never accept them as equal members of their society. These were societies where your position was based upon your power level, and the fact they had no power meant they would always be on the bottom of these societies hierarchy.
A large number of powerless set out to form their own societies. Over time these powerless became known as humans, and many of their societies rose and fell--some were absorbed by the supernatural societies they had broken away from while others were simply destroyed.