There appear to be only two possible reasons for Wallace’s conspicuous absence in Jerry Coyne’s book.
Yet, having conceded, Shermer goes on to move the goalpost.
Shermer’s term “Intelligent Design creationism” signals his own misjudgment in the matter, namely, that ID is creationism.
Wallace emerges from Darwin’s shadow, leaving Darwinian “explanations” looking less like progress and more like — to borrow Wendell Berry’s phrase — “leapfrogging into the dark.”
Wallace would break from Darwin in 1869 and develop a theory of intelligent evolution that in many ways presaged modern intelligent design theory.