I think that the narrator spoke to Sonny's friend to understand what was going on in Sonny's life. It gave him another perspective to look from when he was trying to comprehend why Sonny did the things he did and why he took drugs.
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.