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The psychological theory of personality known as the Dark Triad—narcissism, psychopathy, and Machiavellianism—often carries a sinister undertone. When it comes to leaders, research has shown that ...

Mental toughness isn't a personality trait — it's a trained discipline. Here's how founders and executives can strengthen ...

The authors do not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and have disclosed no relevant affiliations beyond their ...