Marcus Tso uses an interdisciplinary methodology to reexamine a long-neglected subject. Rather than the contents of ethics, the author focuses on the bases of ethics in the Qumran community, using the texts it collected as the primary evidence. He begins by comparing the ethical language of the Scrolls with other related literatures, then places the discussion in a historical framework based on recent findings. With the central chapters of the thesis, he explores four interrelated bases of Qumran ethics: e.g., how scriptural tradition(s) supported sectarian moral cosmology and halakhah; how...