This sort of book, whose name, alas, is Legion, attemps to take on the religious on their own terms. It is a fool's errand*. Let us imagine that those without faith maintained the existence of a hypothetical substance, imperceptible to the senses - call it Sprod - that prevented any supernatural emanations or visitations ('gods' and the like) from ever having been. Now imagine the committed religious being challenged to *prove* that Sprod is a fabrication, a delusion! Surreal doesn't cover it. So why put ourselves through these hoops? God is a three-letter word (in English, at least; I've long pondered what His Goddiness calls herself) that means whatever you want it to mean. It is a word on the meaning of which no two believers, if pressed, could ever agree, once they diverged from 'the Party line'**, whose meaning is also studiously ambiguous - postmodern, even. God-addiction is like any other. These guys do not want our help. If they need their Sunday fix, what earthly concern is it of ours? Find another corpse, Grayling; this one has been flogged, flayed and gnawn these past five hundred years (or since Spinoza at least) yet *still* stalks the land trailing followers in its wake. It's a ***** miracle!
* Private Eye, 5 April 2013, of Grayling's latest effort: '..so hackneyed and unfruitful a topic as the non-existence of God'
** Folk who said communism resembled religion spoke wiser than they knew. Both were imposed by a handful of zealots. Beware inspiration/the 'spiritual' (spirit: hot air)