Racism rests on two basic assumptions: that a correlation exists between physical characteristics and moral qualities; that mankind is divisible into superior and inferior stocks. Racism, thus defined, is a modern conception, for prior to the XVIth century there was virtually nothing in the life and thought of the West that can be described as racist. To prevent misunderstanding a clear distinction must be made between racism and ethnocentrism ... The Ancient Hebrews, in referring to all who were not Hebrews as Gentiles, were indulging in ethnocentrism, not in racism. ... So it was with the Hellenes who denominated all non-Hellenes—whether the wild Scythians or the Egyptians whom they acknowledged as their mentors in the arts of civilization—Barbarians, the term denoting that which was strange or foreign.