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https://en.wikipedia.org/wiki/Dark_triad

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]

Narcissism is characterized by grandiosity, pride, egotism, and a lack of empathy.[10]
Machiavellianism is characterized by manipulativeness, indifference to morality, lack of empathy, and a calculated focus on self-interest.[11][12]
Psychopathy is characterized by continuous antisocial behavior, impulsivity, selfishness, callous and unemotional traits (CU),[13] and remorselessness.[14]
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.[15] They also tend to be less compassionate, agreeable, empathetic, and satisfied with their lives, and less likely to believe they and others are good.[16] However, the same traits are also associated with some positive outcomes, such as mental toughness and being more likely to embrace challenges.[17]

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.[12] 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.[18]

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