
In chapter 5, titled the
Decent of the Modernists, Feser explains his discontent on how rejecting A-T metaphysics has ultimately lead to the modern preponderance among academics (and I suppose society in general) of the secular and atheistic mindsets. Public enemy number one seems to be the "father of modern philosophy" himself,
Rene Descartes (1596-1650). It was he, along with his predecessors
John Duns Scotus, and
William of Ockham, the latter of whom helped foster nominalism and conceptualism to rival Aristotle and Plato's two versions of realism, lead to the "undoing of the Scholaic tradition". (167)
Pre-birth of the modern
According to Feser, both Scotus and Ockham's views on metaphysics and god lead them to conclude that god cannot be known through reason, and must be believed on faith. In other words, god's existence
cannot be proved, they contend, and since Descartes' time this general theological view which rejects A-T metaphysics in favor of a more mechanistic view of nature has dominated Western thought. This, Feser says, is what many of the New Atheists pick up on in their critique of theism in general. Feser spends several pages on Hitchens' book
god is not Great, criticizing his alleged ignorance of
Ockham's razor. Feser argues that versions of it previously were addressed by Aquinas himself and even Aristotle. That may be so, but it doesn't show that change, causation, and final causality
necessarily entail "God" — who is dispensed by the razor. Adding god into the mix just adds more unanswerable questions and logical problems.
Scotus' skepticism, Feser says, is motivated by an emphasis on god's
will over his
intellect.
So radically free is God's will, in Scotus's view, that we simply cannot deduce from the natural order either His intentions or any necessary features of the things He created, since He might have created them in any number of ways, as His inscrutable will directed. Ockham pushes this emphasis on the divine will further, holding that God could by fiat have made morally obligatory all sorts of things that are actually immoral; for example, had He wanted to, He could have decided to command us to hate Him, in which case this is what would be good for us to do. Thus we are brought by Ockham to the idea that morality rests on completely arbitrary demands rather than rationally ascertainable human nature. (168)
But wait a second. If god created
that human nature, couldn't he have created us with a
different nature, which would rationally entail a different kind of morality? Couldn't god, for example, have made humans reproduce by laying a large amount of eggs ensuring that only a few could possibly be raised to adulthood instead of giving birth to live young? What principle prevents god from doing that? In other words, was god's choice in creating our nature the way it is at all arbitrary, or is there some logically necessary reason why he created our nature the way it is? If so, what's that logically necessary reason? If not, then our morality is ultimately arbitrary
even if it logically entails from our nature, because our nature itself would be arbitrary.
Feser takes a long swipe at Hitchens' critique of Ockham's views that we cannot prove a first cause with the traits typically associated with theism—omnipotence, omnibenevolence, omniscience, etc., and deal with the "unanswerable question of who designed the designer or created the creator." (
god is not Great, p. 71) But this was answered "long before Ockham was born" Feser states. (170) This may be so, but it would make little difference to the question of god's existence if A-T metaphysics ultimately fails to make a convincing case
proving a first cause with typical theistic traits must exist, as I think it does. I do agree with Feser that Hitchens does not engage deeply with the metaphysical arguments for god.
God is not Great doesn't set out to disprove the existence of god, it's primary goal is to show how
religion poisons everything by critiquing religious history, belief, traditions, and institutions,
especially the Abrahamic religions. And I think it does a damn good job doing so. But Feser is focused on the metaphysical arguments, which you're not going to get in great detail with Hitchens, who was best at showing how absurd, stupid, and harmful religion is.