Phylogenetic Inertia and Darwin's Higher Law
Document Type
Article
Publication Date
2011
Abstract
The concept of ‘phylogenetic inertia’ is routinely deployed in evolutionary biology as an alternative to natural selection for explaining the persistence of characteristics that appear sub-optimal from an adaptationist perspective. However, in many of these contexts the precise meaning of ‘phylogenetic inertia’ and its relationship to selection are far from clear. After tracing the history of the concept of ‘inertia’ in evolutionary biology, I argue that treating phylogenetic inertia and natural selection as alternative explanations is mistaken because phylogenetic inertia is, from a Darwinian point of view, simply an expected effect of selection. Although Darwin did not discuss ‘phylogenetic inertia,’ he did assert the explanatory priority of selection over descent. An analysis of ‘phylogenetic inertia’ provides a perspective from which to assess Darwin’s view.
Recommended Citation
Shanahan, Timothy. "Phylogenetic Inertia and Darwin's Higher Law," Studies in History and Philosophy of Biological and Biomedical Sciences, Volume 42, March 2011, pp. 60-68. https://doi.org/10.1016/j.shpsc.2010.11.013
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