Creationism, which means simply a belief in creation. In Darwinist usage, which dominates not only the popular and profession scientific literature but also the media, a creationist is a person who takes the creation account in the Book of Genesis to be true in an very literal sense. It is a major theme of Darwinist propaganda that the only persons who have any doubts about Darwinism are young-earth creationists of this sort, who are always portrayed as rejecting the clear and convincing evidence of science to preserve a religious prejudice. The implication is that citizens of modern society are faced with a choice that is really no choice at all. Either they reject science altogether and retreat to a pre-modern worldview, or they believe everything the Darwinists tell them.
In a broader sense, however, a creationist is simply a person who believes in the existence of a creator, who brought about the existence of the world and its living inhabitants in furtherance of a purpose. If God brought about our existence for a purpose, then the most important kind of knowledge to have is knowledge of God and of what He intends for us. Is creation in that broad sense consistent with evolution?
The answer is absolutely not, when "evolution" is understood in the Darwinian sense. To Darwinists evolution means naturalistic evolution, because they insist that science must assume that the cosmos is a closed system of material causes and effects, which can never be influenced by anything outside of material nature-by God, for example. In the beginning, an explosion of matter created the cosmos, and undirected, naturalistic evolution produced everything that followed. From this philosophical standpoint it follows deductively that from the beginning no intelligent purpose guided evolution. If intelligence exists today, that is only because it has itself evolved through purposeless material processes.
A materialistic theory of evolution must inherently invoke two kinds of processes. At bottom the theory must be based on chance, because that is what is left when we have ruled out everything involving intelligence or purpose. Theories which invoke only chance are not credible, however. One thing that everyone acknowledges is that living organisms are enormously complex-far more so than, say, a computer or an airplane. That such complex entities came into existence simply by chance is clearly less credible than that they were designed and constructed by a creator. To back up their claim that this appearance of intelligent design is an illusion, Darwinists need to provide some complexity- building force that is mindless and purposeless. Natural selection is by far the most plausible candidate.
If we assume that random genetic mutations provided the new genetic information needed, say, to give a small mammal a start towards wings, and if we assume that each tiny step in the process of wing-building gave the animal an increased chance of survival, then natural selection ensured that the favored creatures would thrive and reproduce. It follows as a matter of logic that wings can and will appear as if by the plan of a designer. Of course, if wings or other improvements do not appear, the theory explains their absence just as well. The needed mutations didn't arrive, or "developmental constraints" closed off certain possibilities, or natural selection favored something else. There is no requirement that any of this speculation be confirmed by either experimental or fossil evidence. To Darwinists just being able to imagine the process is sufficient to confirm that something like that must have happened.
Richard Dawkins calls the process of creation by mutation and selection "the blind watchmaker," by which label he means that a purposeless, materialistic designing force substitutes for the "watchmaker" deity of natural theology. The existence of a potent blind watchmaker follows deductively from the philosophical premise that nature had to do its own creating. There can be argument about the details, but if God was not in the picture something very much like Darwinism simply has to be true, regardless of the evidence.