Pre-adamitism

The doctrine of 'pre-Adamitism,' while heretical and guaranteed to generate storms of controversy, won some prominent adherents.

Source: wiktionary

He probably also had theological reasons for not considering pre-Adamitism.

Source: wiktionary

Various of polygenism (plurality of origin) Theories has found special favor, partly as co-adamitism, or descent of different races from different progenitors (Paracelsus and others), partly as pre-adamitism,

Source: wiktionary

Neither polygenism — which contends that there have been separate creations for each of the distinct species — nor pre-adamitism — which asserts that humanity existed before Adam and that he was the head only of a specific stock — has any support in the Scriptures.

Source: wiktionary