This document discusses modern management theories. It begins by defining modern management and management theories. It then outlines several prominent modern management theories, including the system approach, quantitative approach, total quality management approach, learning organization approach, team building theory, chaos theory, open system theory, and contingency theory. For each theory, it provides a brief overview and definition. The document focuses on explaining key aspects of several theories in more depth, such as total quality management, learning organizations, team building theory and related models like Belbin's team roles and Myers-Briggs Type Indicator. Overall, the document serves to outline and define several important modern management theories.