You need to define a Association between Concerns and and its containing Concerns (Parent-Child-Structure). To do that you need to decorate the History property with the AssociationAttribute . Also you must add a property ParentId to your Concerns class that will be used in the Association.
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.