This note summarizes several major theories of leadership. It is intended to provide a quick overview of the major concepts and points rather than an in-depth understanding of the theories. It includes the Great Man theory, charismatic leadership, and the approaches of McClelland, Winter, Bennis, Burns, Fiedler, Hersey and Blanchard, Path-Goal, Mintzberg, Kotter, Maccoby, and Schein.