Foundational documents of modern biomedical ethics, such as the Nuremberg Code, the World Medical Association's declarations of Geneva and Helsinki, and the Belmont Report, trace their origins to health care professionals' complicity in the Holocaust. Rituals of contemporary medical education, such as white coat ceremonies and oath swearing at graduations, are practices that express professional resolve to never again be complicit in genocide or human exploitation. This article considers a historical approach to teaching the Holocaust's contemporary ethical implications for clinicians and their practices. To claim one AMA PRA Category 1 Credit TM for the CME activity associated with this article, you must do the following: (1) read this article in its entirety, (2) answer at least 80 percent of the quiz questions correctly, and (3) complete an evaluation. The quiz, evaluation, and form for claiming AMA PRA Category 1 Credit TM are available through the AMA Ed Hub TM. History in Ethics Education History can awaken students' imaginations to the past so that they can study its implications for the future. As one bioethicist and historian team suggested: Good history transports those studying and practicing bioethics to an earlier time, figuratively putting them in the shoes of their predecessors and teaching them how these past individuals rationalized ... choices that now seem clearly ethically dubious. Learning how societal values, scientific zeal, ideological beliefs, and the desire for personal achievement influenced these persons reveals how similar factors can and often still remain in play, even in our supposedly more "enlightened" era. 1