This article applies the category of the “moral witness” developed in the philosophical literature to two individuals who fit the category. The first is Norton Cru, a veteran of the Great War and author of two important study of soldiers’ accounts of the war. The second is Leon Welizcker Wells, a survivor of the Holocaust. Like Norton Cru, his memoirs were written as acts of moral witnessing, understood as the direct experience of radical evil and the recounting of that experience in the face of immoral witnesses, those who provide anodyne or sanitized accounts of the past.