In this section, we delve into the multifaceted history of the Holocaust, beginning with personal narratives like that of Helmuth, a boy who overheard his father's conversations regarding their fears post-World War II. This introduction serves as a foundation to discuss Nazism as a political system characterized by profound racial ideologies, leading to mass atrocities during the Second World War. The discussion progresses to the Nuremberg Trials that followed the war, examining the concept of Crimes Against Humanity. The systematic genocide orchestrated against Jews—six million killed—alongside other targeted groups, illustrates the extreme manifestations of Nazi beliefs and the creation of death camps such as Auschwitz. Key historical events and policies that facilitated the genocide, including the Nuremberg Laws, the concept of Lebensraum (living space), and the establishment of concentration camps, show how a radical and racist ideology translated into horrific reality. The section closes by emphasizing the significance of conserving memories of these atrocities to prevent future occurrences and the roles of testimony and documentation in this regard.