Polygenism is a theory of human origins positing that the human races are of different origins (polygenesis). This is opposite to the idea of monogenism, which posits a single origin of humanity. Modern scientific views no longer favor the polygenic model, with the monogenic "Out of Africa" theory being the most widely accepted model for human origins.
Many oral traditions feature polygenesis in their creation stories. For example, Bambuti mythology and other creation stories from the pygmies of Congo state that the supreme God of the pygmies, Khonvoum, created three different races of man separately out of three kinds of clay: one black, one white, and one red. In some cultures, polygenism in the creation narrative served an etiological function. These narratives provided an explanation as to why other people groups exist who are not affiliated with their tribe. Moreover, distinctions made between the creation of foreign people groups and the tribe or ethnic group to which the creation myth pertains served to reinforce tribal or ethnic unity, the need to exercise wariness and caution when dealing with outsiders, or the unique nature of the relationship between that tribe and the deities of their religious system. An example may be found in the creation myth of the Asmat people, a hunter-gatherer tribe situated along the south-western coast of New Guinea. This creation myth asserts that the Asmat themselves came into being when a deity placed carved wooden statues in a ceremonial house and began to beat a drum. The statues became living humans and began to dance. Some time later, a great crocodile attempted to attack this ceremonial house, but was defeated by the power of the deity. The crocodile was cut into several pieces and these were tossed in different directions. Each piece became one of the foreign tribes known to the Asmat.
The idea is also found in some ancient Greek and Roman literature. For example the Roman Emperor Julian the Apostate in his Letter to a Priest wrote that he believed Zeus made multiple creations of man and women. In his Against the Galilaens Julian presented his reasoning for this belief. Julian had noticed that the Germanics and Scythians (northern nations) were different in their bodies (i.e complexion) to the Ethiopians. He therefore could not imagine such difference in physical attributes as having originated from common ancestry, so maintained separate creations for different races.