Dr. Julia Shaw, a criminal psychologist uses the latest scientific research to offer a more enlightened and nuanced explanation for why people behave so badly and how we can prevent evil acts by understanding more profoundly how such acts come about - and what truly makes us evil.

Introduction: The hunger -- Your inner sadist: the neuroscience of evil -- Hitler's brain, aggression and psychopathy -- Murder by design : the psychology of bloodlust -- On serial killers, toxic masculinity and ethical dilemmas -- The freak show : deconstructing creepiness -- On clowns, evil laughs and mental illness -- Two-faced tech : how technology changes us -- On air pirates, bad bots and cyber trolls -- Kinky as f*ck : the science of sexual deviance -- On S&M, coming out and zoophilia -- To catch a predator : understanding paedophiles -- On understanding, preventing and humanising -- Snakes in suits : the psychology of groupthink -- On paradoxes, slavery and ethical blindness -- And I said nothing : the science of compliance -- On Nazis, rape culture and terrorism.