The document provides an overview of the evolution of management theory from early classical works to modern approaches. It discusses influential early thinkers like Machiavelli, Sun Tzu, and Taylor and their contributions to establishing scientific management. It then outlines the development of different schools of management thought including classical organization theory, behavioral science, management science, systems theory, and contingency approaches. It notes how management approaches must continue adapting to changing business environments and relationships in the 21st century.