The international community today is hardly in a position to avoid another genocide, as witnessed in Rwanda in 1994, despite the significant evolution of early warning systems in recent years. Based on a review of the literature on early warning and response, as well as inputs from surveyed agencies, Preventing Violence, War and State Collapse assesses the value and role of early warning for the prevention of violent conflict and identifies the most effective early warning and response systems. It concludes with a set of recommendations for policy makers in donor and partner countries in influencing future developments in this field.