Most likely stage is not defined and you need to wait for the onAddedToStage event. But why are you accessing the stage directly anyway? You don't need to, you can simply add your event listener to the current movie clip (which in your case is most likely the document root).
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.