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.
There are two main reasons why such an extremely implausible theory as Darwinism remains so popular in the scientific world.
ID the Future explores key arguments from Dr. Spetner’s books Not by Chance and The Evolution Revolution.
Does modern evolutionary theory guide medicine’s response to COVID-19? Not when you consider that most of the major treatments being used and pursued actually preceded Darwin.