Concept

Hierarchy

Overview

system of elements with multiple levels or tiers that are subordinated to each other

Overview adapted from Wikipedia (CC BY-SA 4.0; see the article history for authors).

Found by search and not yet checked by a person; they may only mention the idea in passing.

It is also to be borne in mind that a classification is a system whose parts are arranged according to a hierarchy. There are dominating members and others which are subordinate to the first; species and their distinctive properties depend upon classes and the attributes which characterize them; again, the different species of a…
Émile Durkheim, The Elementary Forms of the Religious Life
States what Hierarchy is; names Hierarchy several times.
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We proceed in this way through successive stages, till we reach the grade of simple objects. This grade forms the base of the hierarchy.
Alfred North Whitehead, Science and the modern world
Names Hierarchy several times; states what Hierarchy is.
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Obj. 2: Further, Dionysius says (Coel. Hier. iii) that "hierarchy is order, knowledge, and action." But all the angels agree in one order towards God, Whom they know, and by Whom in their actions they are ruled. Therefore all the angels belong to one hierarchy. Obj.
Aquinas Thomas, Summa Theologica, Part I
Names Hierarchy several times; states what Hierarchy is.
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