There are no clear answers as to what causes brain tumors. Brain tumors themselves are not gender or age specific. Scientists are still studying cause and effects on brain tumors.
You can find more information here: braintumor.org/TumorsSublanding.
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.