This chapter discusses theories of leadership including trait theories, behavioral theories, and contingency theories. Trait theories focus on personal qualities that differentiate leaders such as intelligence, courage, and people skills. Behavioral theories examine two leadership styles: initiating structure which focuses on tasks, and consideration which focuses on relationships. Contingency theories propose that effective leadership depends on matching a leader's style to the situation. The chapter also covers charismatic and transformational leadership, authentic leadership, the role of mentoring, and challenges to effective leadership such as complacency and over-control.