Humans are a species of bipedal mammals that originated on Earth and are, currently, the dominant form of life on the planet. An evolutionary development brought about by the First Civilization in order to create a numerous, hardy and docile workforce, humans were the result of a forced evolution of pre-existing primate species.
Following a prolonged period of peace between humanity and their "gods", humanity rebelled and war broke out. This was followed by a global catastrophe which saw the two species brought to the edge of extinction, where they were forced to work together in a much more equal manner than before. Within 100 years of the catastrophe, humanity's creators were dead, but the humans continued to thrive and spread across the globe