The Jewish race is not a homologous group in the purely "biologic" sense. Although they have preserved their racial type, being widely spread over the globe, each group was affected by heredetary influences on the one hand, and by environment on the other. Accordingly, the Jewish population is divided according to their country of origin into two main groups-Ashkenazim and Sepharadim. This division is undoubtedly arbitrary. However, each group has many common
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