Over eight decades, utilising major investigations into how the brain works, he comes tounderstand the workings of his own mind, the minds of patients, victims, and eventually, with courage and sensitivity the minds of perpetrators.Valent reveals how the bulk of our brains conceals a mindset evolved in our jungleheritage, its challenges and traumas. He then describes how this mindset manifests itself in today s world, in violence thatranges from bullying to war, and includes the Holocaust and other genocides.