"Indeed , for several decades , molecular evolutionists have relied on an evolutionary view that abandons the Darwinian presumption of abundant pre-existing variation , assuming instead that the rate of evolution depends directly on the rate of introduction of new alleles by mutation ."
"Interesting , but it appears to ignore the fact that there is pre-existing variation ( just look at the pictures ) . Emphasizing mutations is ok , but relying solely on them will probably skew results ."
"that abandons the Darwinian presumption of abundant pre-existing variation , assuming instead"
"pre-existing variation ( just look at the pictures ) . Emphasizing mutations is ok ,"