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Grades of Organization and the Units of Selection Controversy

Published online by Cambridge University Press:  28 February 2022

Robert C. Richardson
Robert C. Richardson*
Affiliation:
Department of Philosophy, University of Cincinnati, History and Philosophy of Science, University of Pittsburgh
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Extract

R. C. Lewontin (1970) proposed three criteria as jointly sufficient for a unit of evolutionary change and immediately went on to argue that selection could operate simultaneously at a variety of levels of organization. For natural selection to operate on a unit, there must be variation in the objects in question: natural selection “chooses” between alternatives, so there must be different alternatives. This variation must affect fitness: the variation available must create different probabilities of reproductive success. Third, this variation in fitness must be heritable: there must be a correlation between parents and offspring for the traits yielding variation in fitness. In brief, for there to be evolution by natural selection, there must be heritable variation in fitness.

Among the concerns that might be raised over Lewontin's formula, one is particularly important. It was clearly brought out by Williams (1966) and is emphasized by Elliott Sober (1981).

Type
Part VIII. Levels of Explanation in Biology
Information
PSA: Proceedings of the Biennial Meeting of the Philosophy of Science Association , Volume 1982 , Issue 1: Volume One: Contributed Papers 1982 , 1982 , pp. 324 - 340
Copyright
Copyright © Philosophy of Science Association 1982

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Footnotes

1

I am indebted in many points to discussions with William Bechtel and William Wimsatt, and particularly to Richard Burian whose comments saved me from a number of mistakes. This work was supported by a grant from the National Endowment for Humanities and support from the Taft Committee at the University of Cincinnati.

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