Horror movies started to wane around the onset of World War II, and after World War II, when all the troops came home, people weren't really interested in seeing horror movies, because they had the real horror right on their front doorsteps.
“Gay Liberation? I ain't against it, it's just that there's nothing in it for me.”
“The prejudices of ignorance are more easily removed than the prejudices of interest; the first are all blindly adopted, the second willfully preferred.”