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Published online by Cambridge University Press: 01 April 2022
In this paper I defend an etiological theory of biological functions (according to which the proper function of a trait is the effect for which it was selected by natural selection) against three objections which have been influential. I argue, contrary to Millikan, that it is wrong to base our defense of the theory on a rejection of conceptual analysis, for conceptual analysis does have an important role in philosophy of science. I also argue that biology requires a normative notion of a “proper function”, and that a normative notion is not ahistorical.
I am grateful to many people for their helpful comments on earlier drafts of this paper, especially Paul Griffiths, William Lycan, Ruth Millikan, Robert Pargetter, Huw Price, Elliott Sober, and Kim Sterelny.