The Collaborative International Dictionary
Monogeny
Monogeny \Mo*nog"e*ny\, n.
Monogenesis.
(Anthropol.) The doctrine that the members of the human race have all a common origin.
Douglas Harper's Etymology Dictionary
monogeny
"theory that humankind originated from a single pair of ancestors," 1865; see mono- + -geny.
Wiktionary
monogeny
n. 1 monogenesis 2 (context anthropology English) The doctrine that all of the members of the human race have a common origin.