The Roots of Judaism and Christianity The Jews are a people who trace their descent from the biblical Israelites and who are united by the religion called Judaism. They are not a race; Jewish identity is a mixture of ethnic, national, and religious elements. An individual may become part of the Jewish people by conversion to Judaism; but a born Jew who rejects Judaism or adopts another religion does not entirely lose his Jewish identity. In biblical times the Jews were divided into 12 tribes: Reuben, Simeon (Levi), Judah, Issachar, Zebulun, Benjamin, Dan, Naphtali, Gad, Asher, Ephraim, and Manasseh. The word Jew is derived from the kingdom of Judah, which in