Do We Need Species Concepts?

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Science  15 Feb 2002:
Vol. 295, Issue 5558, pp. 1238-1239
DOI: 10.1126/science.1065459

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Genes, Categories, and Species The Evolutionary and Cognitive Causes of the Species Problem. Jody Hey. Oxford University Press, New York, 2001. 235 pp. $45, £34.95. ISBN 0-19-514477-5.

Hey argues that attempts to craft a simple, universal definition of species are doomed because one term cannot capture all of the complexities of evolutionary divergence.