The document provides an overview of 10 different schools of thought on leadership: 1) Great Man Theory which believes great leaders are born not made, 2) Traits Theory which examines the innate traits of leaders, 3) Behavioral Theory which argues that leadership is a set of behaviors that can be learned, 4) Managerial Grid/Role Theory which categorizes leadership styles, 5) Situational Theory which states the situation determines the leader, 6) Transactional Theory where people follow out of rewards and punishments, 7) Transformational Theory where leaders inspire vision and change, 8) Functional Theory focuses on tasks, teams, and individuals, 9) Leadership Practices Inventory asks followers their preferences, and 10) 21Cleader Theory