Circa 1.000.000 BC, the super-advanced spacefaring species known as the Space Gods or the Celestials visited Earth and genetically manipulated the dominant, pre-human ape species to stimulate its evolution, splitting the locals into three sub-species. One of the branches, later known as the Eternals, was modified to increase their ability to manipulate some amounts of cosmic energy with only the power of their minds. When the Celestials had left, the Eternals chose to build their society isolated from their two cousin species inasmuch as possible.