In the aftermath of traumatic events, individuals and groups seek to make sense of these experiences. ‘Never again’ is often considered the primary lesson of genocide. Yet, people may understand this lesson in different ways, and other lessons may also be relevant. The present paper reports a qualitative content analysis of publicly available testimonies from survivors of the Holocaust, the Rwandan Genocide and the Nanjing Massacre (N = 200), examining the lessons of genocide that these survivors shared publicly.