Spiral Dynamics Integral is a model that describes human value systems and how they evolve. It identifies eight value systems, or "levels", that correspond to different ways of thinking and viewing the world. These levels form a spiral pattern with each new level building on the previous ones in increased complexity. The model aims to explain how people think about things and make decisions based on their underlying values rather than surface beliefs. It can be applied to understand individuals, groups, organizations, and societies.