What is the argument raised to oppose the theory of evolution?

It is often fallaciously argued that the process of natural selection described by Darwin simply modifies the mean properties of a species and does not produce new species, or that Darwin failed to produce a workable definition of species and uses the term vaguely. Other arguments include the unsubstantiated assertion that the staggering complexity found in life from the macroscopic to the molecular level cannot be the result of mindless natural processes, and the erroneous claim that no (or not enough) transitional fossils have been found.