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Psychopathy remains a central but unsettled concept at the intersection of neuroscience, business ethics, and criminal law. Is psychopathy a hardwired brain trait, a spectrum of behaviours, or something in between? A new article by Dr. Luke Danagher shows why the answer matters—not only in courtrooms, but also in workplaces and boardrooms. The article highlights five key challenges facing the legal and business community in engaging with psychopathy research: uncertainty about the brain basis of psychopathy, reliability issues in research, problems with popular assessment tools, growing evidence that psychopathy lies on a spectrum, and its extension beyond criminal justice into business ethics. The takeaway? Courts and professionals must handle the science of psychopathy with care and acknowledge the grey areas. By synthesising these literatures, the article offers guidance for courts, legal practitioners, and researchers on how to apply current science cautiously, transparently, and accurately.