With contributions from foremost experts, this authoritative Handbook provides a state-of-the-science review of current knowledge on the psychopathic personality. Coverage includes major theoretical models; conceptual and definitional questions; assessment approaches; and etiological pathways, ranging from family and environmental factors to genes, neurotransmitters, and brain systems. Manifestations of psychopathy in specific populations are addressed, as are links to salient problem behaviors such as aggression, substance abuse, sexual offending, and recidivism. Clinical and legal issues are also examined in depth. Seamlessly edited, each major thematic section concludes with a summary chapter that integrates the findings presented and highlights key questions for future research.