Fisher’s proof of Darwinian evolution has been flipped?
That’s what they say. From the paper by Bill Basener and John Sanford on Fisher’s Fundamental Theorem of Natural Selection, published in The Journal of Mathematical Biology: Abstract: The mutation–selection process is the most fundamental mechanism of evolution. In 1935, R. A. Fisher proved his fundamental theorem of natural selection, providing a model in which the rate of change of mean fitness is equal to the genetic variance of a species. Fisher did not include mutations in his model, but believed that mutations would provide a continual supply of variance resulting in perpetual increase in mean fitness, thus providing a foundation for neo-Darwinian theory. In this paper we re-examine Fisher’s Theorem, showing that because it disregards mutations, and because it Read More ›