1979
DOI: 10.1086/288865
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The Propensity Interpretation of Fitness

Abstract: The concept of “fitness” is a notion of central importance to evolutionary theory. Yet the interpretation of this concept and its role in explanations of evolutionary phenomena have remained obscure. We provide a propensity interpretation of fitness, which we argue captures the intended reference of this term as it is used by evolutionary theorists. Using the propensity interpretation of fitness, we provide a Hempelian reconstruction of explanations of evolutionary phenomena, and we show why charges of circula… Show more

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Cited by 322 publications
(175 citation statements)
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“…First, defining biological concepts at the organism level is certainly done by philosophers of biology: cf. Mills and Beatty (1979) for a well-known example. Second, given the particular ways that mismatch is discussed in the literature (particularly the clinical literature), a focus on individual cases seems to meet the need of those doing research on evolutionary mismatch.…”
Section: The Types and Tokens Objectionmentioning
confidence: 99%
“…First, defining biological concepts at the organism level is certainly done by philosophers of biology: cf. Mills and Beatty (1979) for a well-known example. Second, given the particular ways that mismatch is discussed in the literature (particularly the clinical literature), a focus on individual cases seems to meet the need of those doing research on evolutionary mismatch.…”
Section: The Types and Tokens Objectionmentioning
confidence: 99%
“…Embora, talvez, apenas as adaptações de engenharia sejam adaptações em sentido próprio (cf. Brandon, 1978;Mills & Beatty, 1979), para que possamos dizer que existem pressões seletivas no nível do grupo (e de qualquer outro interatuante) é suficiente postular, nesse nível, adaptações como produto da seleção. Ao longo do artigo, mostrar-se-á que adaptações como produto da seleção no nível do grupo existem e que, de alguma maneira, é só graças a elas que certas adaptações de engenharia podem manifestar-se no nível dos organismos, por exemplo, como no caso dos peixes guppy (cf.…”
Section: Replicadores Veículos E Interatuantesunclassified
“…The propensity interpretation of fitness (PIF) was introduced in the late 1970s by Brandon (1978) and Mills and Beatty (1979). They argued that instead of considering the fitness of organisms to be identified with the actual number of offspring produced, fitness should instead be equated with the probabilistic propensity to produce offspring-a distribution of probability values describing how likely it is that an organism will produce no offspring, one offspring, etc.…”
Section: The Propensity Interpretation Of Fitnessmentioning
confidence: 99%