Take him to wherever you went to get your help. Maybe they can help him, too. Many times when someone gets the help they need to correct mental health issues, they run into a lot of opposition from family and friends, because they are used to certain interpersonal dynamics and don't like it changing.
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.