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Evaluation of Evidence in Group Selection Debates

Published online by Cambridge University Press:  31 January 2023

Elisabeth A. Lloyd*
Affiliation:
University of California, San Diego

Extract

The conflation of two fundamentally distinct issues has generated serious confusion in the philosophical and biological literature concerning the units of selection. The questions of how a unit of selection is defined, theoretically, is rarely distinguished from the question of how to determine the empirical accuracy of claims--either specific or general--concerning which unit(s) are undergoing selection processes. In this paper, I begin by refining a definition of the unit of selection, first presented by William Wimsatt, that is grounded in the structure of natural selection models. I then explore the implications of this definition for empirical evaluation of group selection models. I examine an objection to Wimsatt’s definition raised by Elliott Sober, and I conclude by indicating how the proposed refined definition can clarify which sorts of empirical evidence could be brought to bear on group selection controversies.

Type
Part VIII. Biology
Copyright
Copyright © Philosophy of Science Association 1986

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Footnotes

1

I would particularly like to thank Dick Lewontin for discussing the units of selection problem with me, and for his helpful advice, criticism, and suggestions. For their valuable comments and criticism, I would also like to thank Bas.van Fraassen, Evelyn Fox Keller, Bill Wimsatt, Steve Orzack, Dick Burian, Robert Brandon, Deborah Gordon, Hamish Spencer, David Hull, and Jim Griesemer.

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