We want to understand why healers became killers and use our understanding as a guide for medicine today, ... Even though the horrors of the Holocaust seem to be so long ago, we can never forget this history because it continues to affect medical ethics today. For example, one reason doctors today are so concerned about racial and ethnic health disparities is because our codes of ethics demand that we treat every person equally, without regard to race or ethnic background. This ethical obligation is a direct outgrowth of the horrors of Nazi medicine.