What Drives a Human Being to Take Another Life

Why does one person cross the line into lethal violence while millions of others, facing similar pressures, never do? This book rejects the search for a single answer and instead examines five distinct, well-documented pathways to homicide — impulsive rage, calculated greed, fear-driven self-protection, ideological conviction, and predatory compulsion — each grounded in decades of criminological and psychological research.

Drawing on FBI case classification research, twin and adoption studies on genetic risk, the landmark ACE childhood trauma study, and neurobiological research on psychopathy, it maps the genuinely different mechanisms behind different kinds of killing — and corrects the popular imagination's fixation on rare predatory cases, when the data shows most homicides emerge from ordinary escalation between people who already know each other.