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Petrie remains a controversial figure for his pro-eugenics views and opinions on other social topics, which spilled over into his disputes with the British Museum's Egyptology expert, E. A. Wallis Budge.
Budge's contention that the religion of the Egyptians was essentially identical to the religions of the people of northeastern and central Africa was regarded by his colleagues as impossible, since all but a few followed Petrie in his contention that the culture of Ancient Egypt was derived from an invading Caucasian " Dynastic Race " which had conquered Egypt in late prehistory and introduced the Pharaonic culture ( Trigger, 1994 ).
Petrie was a dedicated follower of eugenics, believing that there was no such thing as cultural or social innovation in human society, but rather that all social change is the result of biological change, such as migration and foreign conquest resulting in interbreeding.
Petrie claimed that his " Dynastic Race ", in which he never ceased to believe, was a " fine " Caucasian race that entered Egypt from the south in late predynastic times, conquered the " inferior " and " exhausted " " mulatto " race then inhabiting Egypt, and slowly introduced the finer Dynastic civilization as they interbred with the inferior indigenous people ( Silberman, 1999 ).
Petrie, who was also affiliated with a variety of far right-wing groups and anti-democratic thought in England and was a dedicated believer in the superiority of the Northern peoples over the Latinate and Southern peoples ( Silberman, 1999 ), derided Budge's belief that the ancient Egyptians were an African people with roots in eastern Africa as impossible and " unscientific ", as did his followers.

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