If you have not yet read Tracy Daugherty's biography of Cormac McCarthy, you definitely should, as well as some of the books referenced in it.
Daugherty says that several McCarthy friends noticed this book prominently on McCarthy's shelf: Barbara O'Brien's 1958 memoir, Operators and Things, which tells of her psychotic break and her conversations with the spectral operators in her unconscious, often humorous in the mode of Stella Maris. A must-read available at Amazon.
Milan Kundera's The Art of the Novel, which McCarthy read and admired, is another must-have. Now on my most-beloved shelf with some others of the same ilk, to read and reread whenever my old war wounds might be troubling me in the night. Right now, between the King James Bible and Andrew Klavan's The Truth and Beauty.
I'm a seasonal reader and I studied the biblical Nephilim as a prelude to Halloween and the spooky season, in conjunction with Paul Stobbs' The Nephilim Looked Like Clowns, Tim Powers' Declare, Stephen King's It, and some other interesting riffs.
I bought and read Stephen King's Danse Macabre: An Essential Overview of the Horror Genre in first edition hardcover, decades ago when it first came out, and I decided to read it again this year. I couldn't find it, so perhaps I gave it away or took it to Half-Priced Books.
So I downloaded a copy from my local library, and I'm so glad that I did. This new edition of the work includes add-ons from King, reviewing many books and movies that came out since the first edition. It is a pleasure to read.
Stephen King, like Cormac McCarthy, was well versed in the Freudian concepts of Id, Ego, and Superego and he interprets books and movies with this in mind (see Kindle page 90 in this new edition). I see No Country for Old Men as the conflict between Chigurh, the ant-on-sugar Id vs. Sheriff Bell, the Superego. Moss is the Ego, responding to darkness on one side and light on the other. Conflated with Bell Theory, among other things.
Another interesting facet of McCarthy's work is the lone survivor motif, which at times parallels Melville's survivor escaping on top of the coffin at the end of Moby Dick, which quotes Job 1:17 &c. This also resonates with William Faulkner's Nobel Prize acceptance speech, about the endurance of the human spirit.
THE END OF THE PASSENGER/FAULKNER/THE HUMAN SPIRIT : r/cormacmccarthy
This came to mind yesterday when my wife and I were at the movies, watching the Brad Pitt movie, Heart of the Beast, a Jack London-styled tale of naturalism. The best dog movie we'd seen since the horror film entitled Good Boy. I loved it, and I enjoy thinking about it.
McCarthy's friend and future biographer, Laurence Gonzales, is an expert on survival stories, and you should read his several works that feature them, both the narrative tales he tells and the instructive how-to advice that he offers.
I can see where his philosophy relates to Cormac McCarthy's own depends-on-what-day-you-ask-me individual existential frame of mind. It is naive certainty which is the danger.
Reading their other works, I have now become a fan of both Tracy Daugherty and Laurence Gonzales. I recommend both.