I believe in other spirit beings, but I do not believe they are the spirit of a human who has died. Some people call them demons. I wrote a hub on it actually.
That said, I have encountered these beings before, I know they are around.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.