There is nothing that natural selection contributes to the theory of evolution, because this mechanism can never increase or improve the genetic information of a species. Neither can it transform one species into another: a starfish into a fish, a fish into a frog, a frog into a crocodile, or a crocodile into a bird. The biggest defender of punctuated equilibrium, Stephen Jay Gould, refers to this impasse of natural selection as follows:
The essence of Darwinism lies in a single phrase: natural selection is the creative force of evolutionary change. No one denies that selection will play a negative role in eliminating the unfit. Darwinian theories require that it create the fit as well.(Stephen Jay Gould, «The Return of Hopeful Monsters», Natural History, Vol 86, July-August 1977, p. 28.)
Another of the misleading methods that evolutionists employ on the issue of natural selection is their effort to present this mechanism as conscious. However, natural selection has no consciousness. It does not possess a will that can decide what is good and what is bad for living things. As a result, one cannot explain biological systems and organs that possess the feature of “irreducible complexity” by natural selection. These systems and organs are composed of a great number of parts cooperating together, and are of no use if even one of these parts is missing or defective. (For example, the human eye does not function unless it exists with all its components intact). Therefore, the will that brings all these parts together should be able to foresee the future and aim directly at the advantage that is to be acquired at the final stage. Since natural selection has no consciousness or will, it can do no such thing. This fact, which demolishes the foundations of the theory of evolution, also worried Darwin, who wrote: “If it could be demonstrated that any complex organ existed, which could not possibly have been formed by numerous, successive, slight modifications, my theory would absolutely break down.” (Charles Darwin, The Origin of Species: A Facsimile of the First Edition, Harvard University Press, 1964, p. 189.)
Through natural selection only the disfigured, weak, or unfit individuals of a species are selected out. New species, new genetic information, or new organs cannot be produced. That is, living things cannot evolve through natural selection. Darwin accepted this reality by saying: “Natural selection can do nothing until favourable variations chance to occur”.18 This is why neo-Darwinism has had to elevate mutations next to natural selection as the “cause of beneficial changes”. However as we shall see, mutations can only be “the cause for harmful changes”.