The long term effects on the brain caused by marijuana use are not yet clear. Some studies have shown an impaired ability to hold short term memory, but other studies dispute this. Actual brain damage has not been shown.
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.