The article explores the concept of psychological ownership, a cognitive-affective state where individuals feel a sense of possession over objects, ideas, or people. It integrates and extends a century of research across disciplines, including psychology, sociology, philosophy, and economics. The authors propose that psychological ownership arises from three key motives: efficacy and effectance, self-identity, and having a place. These motives drive individuals to feel connected to objects, leading to a sense of ownership that is distinct from legal ownership. Psychological ownership is not just about possession but also about the emotional and cognitive connection to the object, which can influence behavior and self-perception. The article discusses how psychological ownership manifests in various contexts, such as personal possessions, homes, and even abstract concepts. It also examines the factors that contribute to the development of psychological ownership, including control over an object, intimate knowledge of it, and investment of self into it. The study highlights the importance of understanding psychological ownership in both theoretical and practical contexts, providing a foundation for further research and application in fields such as management, psychology, and consumer behavior.The article explores the concept of psychological ownership, a cognitive-affective state where individuals feel a sense of possession over objects, ideas, or people. It integrates and extends a century of research across disciplines, including psychology, sociology, philosophy, and economics. The authors propose that psychological ownership arises from three key motives: efficacy and effectance, self-identity, and having a place. These motives drive individuals to feel connected to objects, leading to a sense of ownership that is distinct from legal ownership. Psychological ownership is not just about possession but also about the emotional and cognitive connection to the object, which can influence behavior and self-perception. The article discusses how psychological ownership manifests in various contexts, such as personal possessions, homes, and even abstract concepts. It also examines the factors that contribute to the development of psychological ownership, including control over an object, intimate knowledge of it, and investment of self into it. The study highlights the importance of understanding psychological ownership in both theoretical and practical contexts, providing a foundation for further research and application in fields such as management, psychology, and consumer behavior.