| What does biology have to do with materialism?
If you replaced "Evolutionism" with "Christianity" or "Republicanism", your question at least would make sense.
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“Evolutionism” (or Evolution, for that matter) is not a philosophy, epistemology, or belief system.
However, if you mean something that stands in opposition to metaphysical naturalism (which is anti-science and denies the possibility of objective human knowledge), then, sure, the modern scientific revolution of the 19th century qualifies.
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Evolution is both a scientific fact (e.g. the fossil record) and scientific theory.
The scientific theory of evolution is the most power general explanatory model in all of science. It is the biological equivalent the unifying theory sought by physicists. Without it, biology—and, in fact, every life science collapses. For example, without evolution as its basis, modern medical science is nothing more than the Voodoo mumbo-jumbo practiced by Witch Doctors.
In any case, other than being the legitimate product of the application of the philosophy of science, the scientific method, and an epistemology that believes in the existence of objective human knowledge—evolution has NOTHING to do with philosophy.  |