Using templates and explicit specializations you can do this with just one additional class declaration in Over1.
Better than creating nested classes, you might want to look at embedding those closses into a namespace. That way, you don't need the outer class in order to get the inner class. There are some great arguments for and against in the Google C++ Style Guide.
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.