What is the influence of the dominant passion (anger, pride, vanity, envy, greed, fear, gluttony, lust and laziness) on relationships with a partner, friends, work, money, property, nature, ecology, spirituality, God? Lluís Serra answers this question with this book, the first fruit of his doctoral thesis in psychology, an international pioneer in its genre and subject matter. It is based on a methodical analysis of the enneatypes through an application of Grounded Theory based on six interviews for each character, carried out in Spain and Italy. As the author says: ...My objective is to address the psychological substrate of the capital sins, called here dominant passions, applied in the field of relationships and to build bridges that favor interdisciplinary dialogue, with the help of the map of the psychology of the enneatypes, commonly called the enneagram, in the setting of the teachings of Claudio Naranjo.... Lluís Serra links the monastic tradition of Evagrio Póntico and Juan Casiano with the contributions of G. I. Gurdjieff, Oscar Ichazo and, especially, Claudio Na anjo.