Kirk Cameron, formerly of the American sitcom Growing Pains, has lent his skills to the defense of creationism against Darwinism. He is currently involved in handing out a version of Darwin’s book with a new introduction. Not surprisingly, the introduction is highly critical of Darwin.
While there are some reasonable criticisms of evolution and it is quite possible to give reasonable arguments in favor of teleology (see, for example, Plato, Aristotle, and Aquinas), this introduction seems to focus primarily on ad homimen attacks against Darwin. To be specific, the main criticisms seem to be allegations that Darwin’s theory influenced Hitler, that Darwin was a racist and that Darwin was a misogynist.
The logical response to these charges is quite easy: even if these claims were true, they have no bearing whatsoever on the correctness or incorrectness of Darwin’s claims. After all, these are mere ad homimen attacks.
To see that this sort of reasoning is flawed, simply consider this: Adolf Hitler believed that 2+2=4. Obviously the fact that Hitler was a wicked man has no bearing on the truth of that view. Likewise, even racists believe that fire burns and to say that this makes the claim about fire untrue is obviously false.
To use another example, it has been argued that Hitler was influenced by Christianity. However, it would be a logical error to infer that Christianity is flawed because a wicked person was influenced by it (or believed in it).
Interestingly enough, certain atheists attack religions in the same manner that Darwin is being attacked here: by noting that people who did terrible things were Christians/influenced by Christianity (such as the impact of Christian antisemitism on the Holocaust). Obviously, this sort of tactic is based on a fallacy whether it is used against Darwin’s theory or against a religious view.