Wiktionary
gradualistic
a. Of or pertaining to gradualism
Usage examples of "gradualistic".
They object to it because they think that evolution (still undeniably gradualistic evolution) occurs rapidly during relatively brief bursts of activity (speciation events, which provide a kind of crisis atmosphere in which the alleged normal resistance to evolutionary change is broken).
A more recent study of the claim of evolutionary transition of types, as opposed to the uncontroversial fact of variation within types stated: "The known fossil record fails to document a single example of phyletic (gradual) evolution accomplishing a major morphologic transition and hence offers no evidence that the gradualistic school can be valid.