The term dark personalities refer to a set of socially aversive traits (such as spitefulness, greed, sadism, narcissism, psychopathy, and Machiavellianism) in the subclinical range. And thus, according yo this article, those with dark personality traits are slightly more likely to emerge as leaders and are seen as charismatic but, when it comes to getting the job done, they tend to achieve less and are considered poor team players.
