The one category entity minted for every live entity type in this atlas, the top level anchor each type's own subcategory tree and section band files under. This category exists so the structural scaffolding itself, sections, categories and subcategories, has a filed home the same way every ordinary subject entity does, rather than living outside the entity graph as a bare table row. A reader browsing this category sees the full list of what this atlas classifies content by: institutions, policy, approaches, theory, thinkers, qualifications, sources and the rest.