Do numbers matter? Learn about genocide, and often the first fact you’ll learn about is the number of victims. Six million Jews perished during the Holocaust. A million and a half Cambodians were killed during their genocide, eight hundred thousand Tutsis in Rwanda. While the UN Genocide Convention does not include a numerical threshold for genocide in its definition, we often equate the number of victims so closely with an act of genocide that the number itself seems to define the crime. Without such a threshold, does genocide occur?