Karaite Judaism emerged in the ninth century in the Islamic Middle East as an alternative to the rabbinic Judaism of the Jewish majority. Karaites reject the underlying assumption of rabbinic Judaism, namely, that Jewish practice is to be based on two divinely revealed Torahs, a written one, embodied in the Five Books of Moses, and an oral one, eventually written down in rabbinic literature. Karaites accept as authoritative only the Written Torah, as they understand it, and their form of Judaism therefore differs greatly from that of most Jews. Despite its permanent minority status, Karaism...