The dark triad is a psychological theory of personality, first published by Delroy L. Paulhus and Kevin M. Williams in 2002,[1] that describes three notably offensive, but non-pathological personality types: Machiavellianism, sub-clinical narcissism, and sub-clinical psychopathy.[2][3][4][5] Each of these personality types is called dark because each is considered to contain malevolent qualities.[2][6][7][8]
All three dark triad traits are conceptually distinct although empirical evidence shows them to be overlapping. They are associated with a callous–manipulative interpersonal style.[9]
High scores in these traits have been found to statistically increase a person's likelihood to commit crimes, cause social distress, and create severe problems for organizations, especially if they are in leadership positions.[14] They also tend to be less compassionate, agreeable, empathetic, and satisfied with their lives, and less likely to believe they and others are good.[15]
A factor analysis found that among the big five personality traits, low agreeableness is the strongest correlate of the dark triad, while neuroticism and a lack of conscientiousness were associated with some of the dark triad members.[11] Research indicates that there is a consistent association between changes in agreeableness and the dark triad traits over the course of an individual's life.[16]