Natural selection can explain “the survival of the fittest but not the arrival of the fittest.”
In my new contribution, I restrict myself to important facets of the historical side of plant gall research.
Taking the facts and arguments presented together, it appears to be clear that no macroevolution is happening in “Darwin’s finches.”
The authors offer a selectionist explanation, which is nevertheless uncertain. Note the repeated use of the subjunctive.
This is by no means an all-or-nothing selection (as the impression is sometimes given). Rather, the alleles are retained.