Behold, I shew you a mystery;
We shall not all sleep, but we shall all be changed, In a moment, in the twinkling of an eye, at the last trump: for the trumpet shall sound, and the dead shall be raised incorruptible, and we shall be changed. For this corruptible must put on incorruption, and this mortal must put on immortality.
O death, where is thy sting?
O grave, where is thy victory?
1 Corinthians 15:51-51,55
I believe that one of the noteworthy cultural markers was Charles Dickens’ 1843, “A Christmas Carol.”
Another driver of spiritualism was the American Civil War, which brought
death on an unprecedented scale. Often, the bodies could not be
identified (a problem that got much worse in the Great War) or could not
be shipped home but had to be buried 
nearby, which prevented closure
for their loved ones, and added to an interest in trying to communicate
with the dead.
Today, spiritualism is everywhere. Even Christians, who ought to know better, seem to prefer the
idea that a disembodied consciousness continues on after death to the
Bible doctrine of unconscious sleep until the Resurrection Morning, when
we are given new life in glorified, incorruptible bodies."
David Read/Fulcrum7