Hebrew religion began to give rise to Judaism after the destruction of the temple and the exile of Judah in 586 BC. The term "Jew," in its biblical use, is almost exclusively postexilic. The Jewish religion of the biblical period evolved through such historical stages as the intertestamental, rabbinic, and medieval to the modern period of the nineteenth century with Orthodox, Conservative, and Reform Judaism.
Along the way Jewish religion took on new teachings and practices. But with the lengthy development of Judaism and its many changes it is incorrect to posit, as some have done, that Jewish history produced two separate religions: an OT religion of Israel and the postexilic religion of Judaism. Despite the shifting phases of its history, the essence of the religious teaching of Judaism has remained remarkably constant, firmly rooted in the Hebrew Scriptures (OT). Judaism is a religion of ethical monotheism. For centuries many Jews have sought to distill its essential features from one biblical verse that calls Israel "to act justly, to love mercy and to walk humbly with your God" (Mic. 6:8). The Babylonian exile brought certain modifications in Jewish religious life. Deprived of land, temple, and cultic priestly ministrations, Judaism began to adopt a nonsacrificial religion. Jews began to gather in homes for the reading of Scripture, for prayer and instruction. Here may be traced the earliest roots of the synagogue. Now "lip sacrifice" (prayer and penitence) rather than "blood sacrifice" (sheep and goats) became central to the life of piety.
There was one thing Israel carried to Babylon and clung to dearly. It was the law, the Torah, for by it Israel was assured of its divine calling and mission. In the fifth century the "father of Judaism," Ezra the scribe, ...