polygenism
Noun
Meaning
The doctrine that animals of the same species have sprung from more than one original pair.
Source: Webster's dictionaryExamples
Henceforth, scientific racist discourses could be defined as the combination of polygenism, unilinealism, social Darwinism and eugenism.
He later extended this idea to humans in his theory of polygenism.
I think the point is that Humani Generis itself — while not arguing that polygenism is clearly consistent with Catholic doctrine — does not exclude the possibility that polygenism is consistent, or will be found to be consistent, with Catholic doctrine.