The two faces of fitness
| Abstract | The concept of fitness began its career in biology long before evolutionary theory was mathematized. Fitness was used to describe an organism’s vigor, or the degree to which organisms “fit” into their environments. An organism’s success in avoiding predators and in building a nest obviously contribute to its fitness and to the fitness of its offspring, but the peacock’s gaudy tail seemed to be in an entirely different line of work. Fitness, as a term in ordinary language (as in “physical fitness”) and in its original biological meaning, applied to the survival of an organism and its offspring, not to sheer reproductive output (Paul ////; Cronin 1991). Darwin’s separation of natural from sexual selection may sound odd from a modern perspective, but it made sense from this earlier point of view. | |||||||||
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James Maclaurin, Fitness: Philosophical Problems. Encyclopedia of Life Sciences.
Susan K. Mills & John H. Beatty (1979). The Propensity Interpretation of Fitness. Philosophy of Science 46 (2):263-286.
Marshall Abrams (2009). The Unity of Fitness. Philosophy of Science 76 (5).
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Marshall Abrams (2009). Fitness “Kinematics”: Biological Function, Altruism, and Organism–Environment Development. Biology and Philosophy 24 (4):487-504.
Marshall Abrams (2007). Fitness and Propensity's Annulment? Biology and Philosophy 22 (1):115-130.
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