Effective leadership does not occur by chance. Leaders must be trained and groomed for the daunting responsibility of leading organizations. Research shows that half of the people currently in leadership positions will fail. Why they fail and what can be done to prevent failure are the main subjects of this book. It shows that effective leadership is possible and illustrates why and how, based on research and case studies from an epidemiological perspective. The epidemiological word ""determinant"" is used frequently, and is a word that no other book on leadership uses. Epidemiologists work fr.