Leadership has been a scientific discipline for over 100 years. The magnitude of research has increased tremendously. Many different objects of study related to leadership have been investigated with the ambition to solve a variety of problems that appear to be more or less relevant for those in leadership positions. In the current article, the author provides one person's description of eight specific areas of leadership scholarship throughout all these years and how he has reflected upon these theories in light of this fundamental question: what has leadership research really accomplished? These considerations on leadership theories are a product of a lifetime spent on leadership research.