Polygenesis fell just as a new race theory rose to replace it.

Evidence

On the lips of one of America’s most renowned politicians, it looked as if polygenesis had finally become mainstream. In actuality, the days of the notion of separately created human species were numbered. Another pernicious theory of the human species was about to take hold, one that would be used by racist apologists for the next one hundred years. — Ibram X. Kendi, Stamped from the Beginning, 556

Categorization

• XREF: The reader’s framework for placing racist theories — polygenesis replaced by evolutionary racism — extends Kendi’s three-way scheme.