I think recentlyis was reported that google had changed how they deal with subdomains so that they are judged to be separate from the main domain. At least for the puprose of PR. I would say to be on the safe side it's important to have links from the main domains (of from other subdomains) to help with the link juice.
Don't take this as gospel though. It's very difficult to truly know how google's algorithym works.
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.