In this book Franco de Masi examines the terminology used in the analysis of sadomasochism and surveys in detail the theories of other psychoanalysts. He explores the relationship between sadomasochism and other conditions, such as depression, psychosis and borderline states, and discusses the nature of evil in the broadest way possible.

This book examines the terminology used in the analysis of sadomasochism, surveys extensively, and in detail, the theories of other psychoanalysts, and explores the relationship between sadomasochism and depression; its relationship to psychosis, borderline states, and many other conditions.