After overviewing the history of leadership theory, reviewing normal range personality traits (Extraversion, Neuroticism, Conscientiousness, Agreeableness and Openness) and subclinical traits, such as the Dark Triad (Narcissism, Machiavellianism and Psychopathy), the book moves on to thoroughly bring the perspective of interpersonal psychology to bear on questions of personality and leadership, and ends by narrowing in on how the dark side of personality affects the leadership process—for better and for worse.