This document provides a summary of leadership theories and concepts. It begins with definitions of leadership and discusses the nature of leadership, including key leadership behaviors and skills. It then contrasts leadership and management. The remainder summarizes various theories and approaches to leadership, including trait, behavioral, contingency, situational, and relationship-based theories. It discusses concepts such as followership, self-leadership, and superleadership. The document is intended to provide an overview of studying the nature and practice of leadership.