If I understand correctly, what you call parent class is not really a parent class. This is, you don't mean that class bird inherits from that parent class; you mean that it is declared inside that class. Such as this.
I may be wrong, but it seems like your approach is wrong. Try this.
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.