Psychopaths continue to be demonised by the media and estimates suggest that a disturbing percentage of the population has psychopathic tendencies. This timely and controversial new book summarises what we already know about psychopathy and antisocial behavior and puts forward a new case for its cause - with far-reaching implications. * Presents the scientific facts of psychopathy and antisocial behavior. * Addresses key questions, such as: What is psychopathy? Are there psychopaths amongst us? What is wrong with psychopaths? Is psychopathy due to nature or nurture? And can we treat psychopaths? * Reveals the authors’ ground-breaking research into whether an underlying abnormality in brain development leaves psychopaths with an inability to feel emotion or fear. * The resulting theory could lead to early diagnosis and revolutionize the way society, the media and the state both views and contends with the psychopaths in our midst.