*The aim of this little book is to present in brief outline some of the leading conceptions of the religion familiar since the Christian Era under the name Judaism. The word ‘Judaism’ occurs for the first time at about 100 B.C., in the Graeco-Jewish literature. In the second book of the Maccabees (ii. 21, viii. 1), ‘Judaism’ signifies the religion of the Jews as contrasted with Hellenism, the religion of the Greeks. In the New Testament (Gal. i. 13) the same word seems to denote the Pharisaic system as an antithesis to the Gentile Christianity. In Hebrew the corresponding noun never occurs in the Bible, and it is rare even in the Rabbinic books. When it does meet us, Jahaduth implies the monotheism of the Jews as opposed to the polytheism of the heathen.*