The Dark Triad of Personality summarizes the latest research on how these personality traits (psychopathology, narcissism, Machiavellianism) are defined and displayed, and also explores what impact they have on individuals and society, the relationship between clinical conditions and personality traits, and how these traits may be adaptive. The book introduces the Dark Triad through the lens of the existing clinical and personality literature, discussing shared and unique cognitive and empathetic profiles associated with each trait. Antisocial, antagonistic, and criminal behaviors associated with the Dark Triad are also covered, as are how these traits impact the way individuals compete for mates, their existence in the workplace, and how individuals high in the Dark Triad behave and are perceived by others in social media. Summarizes research on the Dark Triad personality traits Reviews development, measurement, and evolutionary origins of these traits Explores how these traits may be adaptive Assesses the relationship between clinical conditions and Dark Triad personality traits Discusses manipulation, competition, and cooperation.