polygenesis

Noun

 * 1) The genesis of a species from more than one ancestor.
 * 2)  The theory that living organisms originate in cells or embryos of different kinds, instead of coming from a single cell; as opposed to monogenesis.
 * 3)  The theory that languages developed independently in different places at different periods, as opposed to originating from a single source.
 * 4) The emergence from multiple causes or origins.
 * 1) The emergence from multiple causes or origins.
 * 1) The emergence from multiple causes or origins.