Leon Wieseltier does a job on Daniel Dennett's Breaking the Spell in the New York Times Book Review: The God Genome. (Hat tip, Brandywine Books.)
Like many biological reductionists, Dennett is sure that he is not a biological reductionist. But the charge is proved as early as the fourth page of his book. Watch closely. "Like other animals," the confused passage begins, "we have built-in desires to reproduce and to do pretty much whatever it takes to achieve this goal." No confusion there, and no offense. It is incontrovertible that we are animals. The sentence continues: "But we also have creeds, and the ability to transcend our genetic imperatives." A sterling observation, and the beginning of humanism. And then more, in the same fine antideterministic vein: "This fact does make us different."
Then suddenly there is this: "But it is itself a biological fact, visible to natural science, and something that requires an explanation from natural science." As the ancient rabbis used to say, have your ears heard what your mouth has spoken? Dennett does not see that he has taken his humanism back. Why is our independence from biology a fact of biology? And if it is a fact of biology, then we are not independent of biology. If our creeds are an expression of our animality, if they require an explanation from natural science, then we have not transcended our genetic imperatives. The human difference, in Dennett's telling, is a difference in degree, not a difference in kind — a doctrine that may quite plausibly be called biological reductionism