What if the monsters were never monsters at all? In 1968, a schoolteacher in Iowa divided her classroom by eye colour. Within minutes, ordinary children became tyrants. Within hours, their victims had forgotten how to read. The experiment lasted two days. The lesson it taught has haunted psychology ever since. Manmade Monsters: A Dangerous World traces a single, terrifying mechanism across five thousand years of human history. From the blood-soaked steps of Aztec temples to the gas chambers of Auschwitz. From neighbours killing neighbours with machetes in Rwanda to a city that hosted the Winter Olympics becoming a killing field eleven years later. From medieval witch burnings to the modern-day exclusion of citizens branded as unacceptable by their own governments. The mechanism is always the same. An authority draws a line. A group is declared less than human. Permission is granted. And ordinary people — teachers, farmers, doctors, parents — do the rest. This is not a book about evil. Evil is easy to understand. This book is about something far more dangerous: the ordinary human capacity for cruelty when the right conditions are met. It is about the neighbour who turns informer. The bureaucrat who processes the paperwork. The crowd that watches and does nothing. The society that looks away and calls it freedom. Heinrich Wilson dismantles the comfortable lie that atrocities are committed by monsters. They are committed by people. People exactly like you. People exactly like the person sitting next to you right now. The only difference between a civilised society and a bloodbath is the presence or absence of three things: authority, division, and permission. Manmade Monsters will change the way you see the world. More importantly, it will change the way you see yourself. You are not immune. No one is. And that is the most dangerous truth of all.