How Do Natural Selection and Random Drift Interact?
Philosophy of Science 74 (5):666-679 (2007)
| Abstract | One controversy about the existence of so called evolutionary forces such as natural selection and random genetic drift concerns the sense in which such “forces” can be said to interact. In this paper I explain how natural selection and random drift can interact. In particular, I show how population-level probabilities can be derived from individual-level probabilities, and explain the sense in which natural selection and drift are embodied in these population-level probabilities. I argue that whatever causal character the individual-level probabilities have is then shared by the population-level probabilities, and that natural selection and random drift then have that same causal character. Moreover, natural selection and drift can then be viewed as two aspects of probability distributions over frequencies in populations of organisms. My characterization of population-level probabilities is largely neutral about what interpretation of probability is required, allowing my approach to support various positions on biological probabilities, including those which give biological probabilities one or another sort of causal character. ‡This paper has benefited from feedback on and discussions of this and earlier work. I want to thank André Ariew, Matt Barker, Lindley Darden, Patrick Forber, Nancy Hall, Mohan Matthen, Samir Okasha, Jeremy Pober, Robert Richardson, Alex Rosenberg, Eric Seidel, Denis Walsh, and Bill Wimsatt. †To contact the author, please write to: Department of Philosophy, University of Alabama at Birmingham, HB 414A, 900 13th Street South, Birmingham, AL 35294-1260; e-mail: mabrams@uab.edu. | |||||||||
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Roberta L. Millstein (2006). Natural Selection as a Population-Level Causal Process. British Journal for the Philosophy of Science 57 (4):627-653.
Peter Gildenhuys (2009). An Explication of the Causal Dimension of Drift. British Journal for the Philosophy of Science 60 (3):521-555.
Jessica Pfeifer (2005). Why Selection and Drift Might Be Distinct. Philosophy of Science 72 (5):1135-1145.
Roberta L. Millstein (2008). Distinguishing Drift and Selection Empirically: "The Great Snail Debate" of the 1950s. Journal of the History of Biology 41 (2):339 - 367.
Roberta L. Millstein (2002). Are Random Drift and Natural Selection Conceptually Distinct? Biology and Philosophy 17 (1):33-53.
John Beatty (1984). Chance and Natural Selection. Philosophy of Science 51 (2):183-211.
Mohan Matthen (2010). What is Drift? A Response to Millstein, Skipper, and Dietrich. Philosophy and Theory in Biology 2.
Kenneth Reisman & Patrick Forber (2005). Manipulation and the Causes of Evolution. Philosophy of Science 72 (5):1113-1123.
Denis M. Walsh, Andre Ariew & Tim Lewens (2002). The Trials of Life: Natural Selection and Random Drift. Philosophy of Science 69 (3):452-473.
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