The document provides an overview of Dorothy Johnson's Behavioral System Model theory of nursing. It discusses Johnson's credentials and background, the theoretical sources that influenced her work, the major concepts and relationships within the theory, and its goals, assumptions, and acceptance within nursing. The Behavioral System Model views individuals as behavioral systems striving for equilibrium. Nursing aims to help patients maintain behavioral integrity and stability through external regulation during illness or stress. The theory provides a framework for understanding specific client behaviors.