That is no doubt its true source because it did happen to come directly from Babylon of all places. It was not original with Darwin or his grandfather’s Lunartic Society (pub club) who tried to pass it off to Darwin as real, not knowing he’d believe it and go forth with it.
(This info used to readily available on the Internet until TPB started their scrubbing.)
I was pretty sure it started long before Darwin came along. 😀😊