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.
As existence emerges from the interplay of meaning and causality, and quantity arises from the spatial relationships that govern measurable magnitudes and amounts, everything is the totality of all that exists, encompassing all quantities and their relationships within the three-dimensional expanse.
External reference — all senses of the word “everything” on Wiktionary. This atlas concept maps to only the slice of meaning relevant to the prerequisite graph.