The Creators are belived to be a travelling cluster of different races who came
from another galaxy in seach of the perfect nesting place for creating soliders for their intergalactic war.
They noticed the Earth's peculuar chemical property and set up colonies there and
over a long period of time they experemented on building the supreme being for war.
They created many beings but their ultimate achivement was humanity. They could have
gone futher but I think they thought it was best for humanity to continue working on the perfect battle beings, while they
tend other matters.