19 MAY 2011 by ideonexus

 The Difficulty of Defining Species

The Platonist regards any change in rabbits as a messy departure from the essential rabbit, and there will always be resistance to change - as if all real rabbits were tethered by an invisible elastic cord to the Essential Rabbit in the Sky. The evolutionary view of life is radically opposite. Descendants can depart indefinitely from the ancestral form, and each departure becomes a potential ancestor to future variants. Indeed, Alfred Russel Wallace, independent co-discoverer with Darwin of e...
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The Platonist view of species defines all members as imperfect examples of a perfect example of the species, when in reality, there is a bell curve of examples that blend into other species.