Why? I don’t claim to be overly familiar with him but long ago on this mb (or maybe the BBC one before it) someone (possible you?) recommended a youtube talk by him, which I then critiqued at some length for its various errors and mis-steps. Is this book any more cogent than the talk?
Gray is hardly a fully paid-up theist. His one recurrent theme seems to be the bankruptcy of the ideal of human progress through science, with its implication that our moral stature might grow along with medicine's ability to do heart transplants and scientific technology's ability to send people into outer space. I have to say, I'm much in agreement here, though if I needed a heart transplant and the possibility were available, I don't think I'd be checking out the surgeon's 'moral' credentials, so long as he/she had the ability to do the job.
Supposing we agree that, morally, humankind has not progressed very much over millennia, the next question is - then what? I think Gray for some time considered eastern philosophies like Taoism and Zen Buddhism might have something to offer. Not sure quite where he stands now, despite having read a few volumes of his.
I like his take on Joseph Conrad. Humanity bleak and hopelessly flawed, and no hope of any Redeemers showing up. He could have written a bit more on Schopenhauer; that guy was always in a weird class of his own, and I would suggest his
is a different type of atheism.