Philosophy of Science 75 (5):548-559 (2008)
The neutral and nearly neutral theories of molecular evolution are sometimes characterized as theories about drift alone, where drift is described solely as an outcome, rather than a process. We argue, however, that both selection and drift, as causal processes, are integral parts of both theories. However, the nearly neutral theory explicitly recognizes alleles and/or molecular substitutions that, while engaging in weakly selected causal processes, exhibit outcomes thought to be characteristic of random drift. A narrow focus on outcomes obscures the significant role of weakly selected causal processes in the nearly neutral theory.
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Distinguishing Drift and Selection Empirically: "The Great Snail Debate" of the 1950s.Roberta L. Millstein - 2008 - Journal of the History of Biology 41 (2):339-367.
From Necessary Chances to Biological Laws.C. Haufe - 2013 - British Journal for the Philosophy of Science 64 (2):279-295.
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