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Evolution
(6,411 words)
1. Concept Since the term “evolution” embraces several dimensions, we cannot deal with it adequately without recognizing its various facets and clarifying precisely which of these are at issue in any given context. Four such facets are of particular importance: evolution as (1) an idea of change over time; (2) an idea of emergence, by which novelty arises from preceding entities and processes; (3) an idea that describes the origins of things, both proximate and ultimate; and (4) an idea of selection, explaining why things die or survive. Each of these facets deserves careful attention. 1.…
