monogenesis

mono- +‎ -genesis

• IPA^(key): /mɒnəˈd͡ʒɛnəsɪs/

monogenesis (uncountable)

1. (anthropology) The theory that mankind originated with a single ancestor or ancestral couple.
   • 2003, Roy Porter, Flesh in the Age of Reason, Penguin, published 2004, page 248:

     Some held that negritude was a product of living under the tropical sun, a perhaps beneficial adaptation to a fierce climate – an environmentalist solution chiming with monogenesis and Lockean malleability models.

2. (linguistics) The theory that all languages, or a particular set of languages, originated from a single source.
3. (biology, medicine) Development of the ovum from a parent like itself.
   1. (biology, medicine) Asexual/nonsexual reproduction, which involves only one parent.
4. The emergence from a single cause.

• polygenesis

• nomogenesis