Usually, physicians are regarded as the guardians of health and lives, but what happens when healing conflicts with larger state aims? How do physicians reconcile their Hippocratic oath with a mandate of genocide? Like many other professional groups, doctors are simultaneously members of the social elite and public servants. As such, ruling authorities sometimes use them as agents to provide a legitimizing framework for actions taken by the state. At the same time, doctors are human beings, and as members of a particular society, they are equally susceptible to that society's prevailing social mores and climate. When a state adopts an exclusionary policy of hyper-nationalism, all of its citizens, doctors included, can find themselves on both sides of the divide. Whether as willing participants or as reluctant accomplices, physicians have become involved in the planning and implementation of mass murder in numerous countries.