This book explains the ethical and conceptual tensions in the use of psychopathy in different countries, including America, Canada, the UK, Croatia, Australia, and New Zealand. It offers an extensive critical analysis of how psychopathy functions within institutional and social contexts. Inside, readers will find innovative interdisciplinary analysis, written by leading international experts. The chapters explore how different countries have used this diagnosis. A central concern is whether psychopathy is a mental disorder, and this has a bearing upon whether it should be used. The book's case studies will help readers understand the problems associated with psychopathy. Academics and students working in the philosophy of psychiatry, bioethics, and moral psychology will find it a valuable resource. In addition, it will also appeal to mental health professionals working in forensic settings, psychologists with an interest in the ethical implications of the use of psychopathy as a construct and particularly those with a research interest in it.