I believe you've missed on some basic concepts.
I would suggest two concepts, interfaces and dependency injection, as a way to decouple your classes. Interfaces give you a way to define a contract or set of expected behaviors that is independent of any implementation. When you have a class depend on an interface rather than on a class, you get the freedom to substitute other classes that implement the interface without having to rewrite the class that is depending on it.
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.