The study of ethics in the Dead Sea Scrolls or the communities in them began early in the history of Qumran research, but has recently been neglected. With the full publication of the Scrolls and the emergence of new methodologies in the field, it is time to reopen the subject. An improved understanding of how ethics was formulated in a sectarian Jewish community in the late Second Temple period will not only shed greater light on the nature of this group, but will also inform our perception of the history of both Jewish and Christian ethics. This thesis approaches this task with an interdisciplinary methodology that takes care to allow the Scrolls to speak in their own terms, while the investigation introduces issues about how ethics was developed among the sectarians at Qumran.