Each concept here is mapped to its prerequisites — the ideas you'd need first to understand it — all the way down to four foundations: Space, Time, Energy, Pattern. Click any prerequisite to drill down, or scroll for the chain graph.
A class is a hierarchical structure that organizes individuals into a cohesive group with shared attributes and roles, allowing for social stratification and division of labor.
External reference — all senses of the word “class abs” on Wiktionary. This atlas concept maps to only the slice of meaning relevant to the prerequisite graph.