Genocide and Genocidal Terror: From post disaster emergency response to prediction and prevention: the Need for a Public Health Approach Richter ED and Berman T. Hebrew University Hadassah School of Public Health and Community Medicine Jerusalem Background and Case for Action: Mass killing and destruction or genocidal terror targeted at a group, tribe, nation, or population defined by a common ethnic, religious, racial or political trait by another, has been the ranking cause of violent death in the 20th and 21st centuries. Genocide remains the largest and most horrifying of modern public health epidemic scenarios. The fact that genocides are predictable implies that they are preventable. Currently, there is no formal international system for surveillance, reporting or responding to early predictors of genocide and intervention targeted at the preventable predictors similar to those for epidemics of infectious disease, chemical disasters or natural disasters. There is a need, in particular, for testing the efficacy of international surveillance systems targeted at the Early Warning Signs (EWS) of genocide. Methods: We developed time lines that examine the interval between occurrence of early warning signs of past genocides and reporting (t1) and between reporting and effective response (t2) Results: During the genocides in Rwanda, Yugoslavia, Cambodia and Darfur, there were short intervals (days to weeks) between first warning signs and first reports , (t1) but much longer intervals between first reports and effective response (t2). Blatant and subtle incitement and hate language in the media and apologetic narratives by scientific and intellectual elites are usually prominent detectable early warning signs. Barriers to reporting by outsiders include repression and suppression biases, disbelief, effectiveness of concealment, sociologic narratives or agendas, and political agendas which excuse or explain incitement in terms of real or imagined past grievances or injustices, or unspecified root causes. The time lines show that the international political order in general has either ignored or been late in responding not only to political terror, mass violence, democide and genocide, but also to their warning signs, notably incitement and definable measures of persecution. International activities have been restricted to post-event emergency response to the adverse health impacts from genocidal activities and terror, or the use of armed force against terror. Conclusions: Genocide is both predictable and preventable. We call for an international system for online surveillance and detection of early warning signs such as incitement and hate- language in texts and official media, and for a system of mandatory reporting, censure, and sanctions and defined thresholds for intervention during the pro-dromal period of genocide. Online surveillance should be modeled after international networks for surveillance and reporting of epidemic disease, and should be incorporated into international public health networks for violence prevention. Interventions include publicity, sanctions, criminalization and definable thresholds for the use of armed force. Such a surveillance system will shorten the response and reaction time and trigger appropriate interventions to genocide and mass violence.