We think of Judaism as one of the three great monotheistic religions, and being Jewish as a religious identity. Yet Jewish people are less likely to attend religious services or believe in God than any other American religious or ethnic group. Chances are you know Jewish people who are not members of synagogues, or who are not religious people by practice or belief. That might even describe you! How did American Jews become so secularized? And what does that say about Jewish identity today, and tomorrow?