The history of mass killings, particularly those committed by the Nazis, is a topic that is both disturbing and essential to understand. Books like "The Empire of Destruction: A History of Mass Killings by the Nazis" by Alex Key, published by Alpina Publisher, provide a detailed and insightful look into the events that led to these atrocities. The author attempts to explain the reasons behind the Nazis' actions, not to justify them, but to understand the psychological and ideological motivations that drove them to commit such heinous crimes. The book is a must-read for those who want to understand the complexities of human nature and the dangers of extremism. It is a reminder that ordinary people can become capable of extraordinary evil when driven by hatred and ideology. The book is a powerful tool for educating people about the importance of remembering and learning from history, and it is a testament to the human spirit's capacity for resilience and survival. By reading about the history of mass killings, we can gain a deeper understanding of the importance of promoting tolerance, empathy, and human rights, and work towards creating a more just and peaceful world. How do you approach difficult topics in books? Do you think it's essential to know and understand the history of mass killings, or do you prefer to avoid such heavy subjects?