Strictly motivated by a perceived cultural decline, and as an answer to that decline, specific novel title please... There may be a few, but I doubt many full lenght novels of any note.
I see those goalposts buzzing around like a blue-arsed fly. What about
The Coming Race by Edward Bulwer-Lytton? (Aside: It's the source of the brand name Bovril. I learnt this on the weekend thanks to Mark Kermode. There's no such thing as a wasted fact.)
The stalking hand has appeared many times since the book came out in the 70s, but never before, or since, as the central point of a long story (short stories are another animal). Again, novel title please...
The stalking hand is a much older story. It derives from the notion that the hand -- which is the body part associated with agency and authority -- has its own will, independent of the body. Sheridan Le Fanu used it in
Ghost Stories of the Tiled House. Have you read
Beast With Five Fingers by WF Harvey? It's the short story that re-energised the disembodied hand theme at the very beginning of the 20th Century.
You seem to think novels are this ancient form with a limitless depth of content... They have only really existed in numbers since the 1720s, with only England offering a broad-based lending system called Circulation Libraries for the next 140 years (WHSmith was one of many), before they finally started being affordable everywhere in the 1860-80s (mostly by shifting from linen to wood pulp). Novels became widely affordable less than 150 years ago, most of them being printed in the last 50... Aside Circulation Libraries and newspaper serials (both being only about 250 years old), as an ubiquitous form, novels are pretty newfangled...
Er...no. I'm saying that there are no new stories, only new combinations.
Stories antedate novels by some considerable time. They didn't just spring into being with the development of libraries. I'm not sure if you're familiar with the Iliad, the Odyssey, Norse sagas, the Mabinogion or -- more recently --
Le Morte D'Arthur -- but they're quite old. And they are still as popular af. (Note: Other ancient and early manuscripts are available.)
Btw, the last 50 years only takes us back to 1968.
Writers who don't read widely are hobbling themselves.