 The hypothesis is regarded as a fringe theory.Mainstream scholars reject the notion that Egypt was a black (or white) civilization; they maintain that, despite the phenotypic diversity of Ancient and present day Egyptians, applying modern notions of black or white races to ancient Egypt is anachronistic.In addition, scholars reject the notion, implicit in the black Egypt hypothesis, that Ancient Egypt was racially homogeneous; instead, skin color varied between the peoples of Lower Egypt, Upper Egypt, and Nubia, who in various eras rose to power in Ancient Egypt.