I am interested in the old Mesopotamian versions, whether considered history or mythology. The Sumerians created the "blackheads" to mine gold for them. The gods who were stuck here wanted a little more companionship so they genetically manipulated their slaves by adding their own dna and now they have the other races, who then became impregnated by the gods after "knowledge" was given to them for reproduction. It all comes down to which version of history you want to pay attention to or how far back you want to go.