332 Species
species are individuals is very much a minority opinion, possibly because it is a phil-
osophical thesis rather than a substantive or operational one in biology. Also in the
minority is the view that species are units of evolution (13 of 176). There are some
limitations on this survey and its results: the samples are from the EU and the US and
do not take into account biological practice outside these regions (the views of South
American biologists would be particularly interesting). Also, there may be some self-
selection bias in the results. However, this is the first such study and improves on the
intuitive and anecdotal views ascribed by philosophers and historians.
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