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| | Hierarchy - Psychology Wiki |
 | | A hierarchy (in Greek: Ιεραρχία, it is derived from ιερός-hieros, sacred, and άρχω-arkho, rule) is a system of ranking and organizing things or people, where each element of the system (except for the top element) is subordinate to a single other element. |
 | | The first appearance of "hierarchy" in the Oxford English Dictionary was in 1380, where it was used in reference to the three orders of three angels as depicted by Pseudo-Dionysius the Areopagite. |
 | | Most evolutionary biologists assert a hierarchy extending from the level of the specimen (an individual living organism -- say, a single newt), to the species of which it is a member (perhaps the Eastern Newt), outward to further successive levels of genus, family, order, class, phylum, and kingdom. |
| psychology.wikia.com /wiki/Hierarchy (1490 words) |
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