In human history there is no lack of malice, revenge, or savagery. The twentieth century has seen 33 million military deaths. Victimization deaths are estimated at six times that number, at 205 million people. The past decade has seen people enslaved, tortured, raped, and persecuted as members of political, racial, ethnic, or religious groups in Latin America, Eastern Europe, Asia, and Africa. Yet we have not seen meaningful prosecution of crimes that have occurred on a massive scale. Former United Nations High Commissioner for Human Rights José Ayala Lasso has stated that "a person stands a better chance of being tried and judged for killing one human being than for killing 100,000." This paper examines reconciliation in the aftermath of protracted, deadly, wide scale conflict characterized by impunity when crimes against individuals, groups, and humanity go unpunished. It describes the relevance of moral exclusion theory to conflicts in which dehumanization and violence are normalized, and it argues that impunity is an urgent matter for psychology and social justice research. © 2001 Plenum Publishing Corporation.