Published online by Cambridge University Press: 01 January 2022
There has recently been a renewed interest in the “force” interpretation of evolutionary biology. In this article, I present the general structure of the arguments for the force interpretation and identify a problem in its overly permissive conditions for being a Newtonian force. I then attempt a solution that (1) helps to illuminate the difference between forces and other types of causes and (2) makes room for random genetic drift as a force. In particular, I argue that forces are not different in kind from other types of causes but rather that forces are situated on a continuum of causes distinguished by their unifying power.
Thanks to Malcolm Forster, Daniel Hausman, Elliott Sober, Joel Velasco, and the audience at the 2008 PSA meeting for helpful comments and criticisms.