This document discusses the evolution of management theory over time. It begins with the Classical approach emerging in the 19th century in response to new industrial challenges. This includes Scientific Management by Taylor which aimed to optimize efficiency. It also discusses Administrative Management by Fayol and Weber's bureaucratic model. Later, the Human Relations approach focused on meeting worker needs. Behavioral Management studied how managers motivate employees. Modern approaches include Open Systems theory, Contingency Thinking, and lessons from Japanese management styles. Quantitative and information-based theories were also incorporated into management science.