“Everything is poison, everything is medicine,” said Paracelsus. This is a book about exactly how our brightest strengths turn into critical weaknesses. It is dedicated to destructors—the strengths of a leader that are out of control. Each of these qualities is useful to a certain extent, and sometimes even necessary to achieve success. However, in stressful situations, they can uncontrollably gain strength, seriously undermining the effectiveness of the leader and sometimes leading to catastrophic consequences. Examples of destructors include attention to detail, reaching the point of perfectionism, or self-confidence, which turns into arrogance. The book describes in detail the eleven most common destructors, provides numerous real-life examples, offers self-diagnosis tools and many practical tips and recommendations. At the same time, the book is by no means “a manual for self-accusation and self-flagellation”; on the contrary, it is imbued with optimism and the deepest respect for the uniqueness of each individual. It is a guide that will lead you to the light side of the force. The book was also published under the title “The Dark Side of the Force. Patterns of leadership behavior that can cost careers and business.”