Evolutionism (with its two eldest daughters, phylogenetics and cladistics) is the only systematic synthesis in the history of the universe that proposes an Effect without a Final Cause.
Natural selection works well when it can build structures in small incremental steps. But when multiple mutations are necessary to produce a selective advantage, the odds of the trait arising begin to become very small.
The theory is not mainstream, and has been ridiculed even by hardcore Darwinists. Its publication is a measure of how desperate and beggarly orthodox evolutionary theory is on the topic of metamorphosis in particular.
The problem of making premature claims that we don’t know are correct plagues Dennis Venema’s discussion of human and chimp genetic variation.
The debate over evolution and intelligent design can be confusing because some keys terms in the discussion are ambiguous.