You don't need globals between files, only for functions.
In PHP, the global keyword allows you to reference variables in the global scope from inside a local scope - eg to access a global variable inside a function. You don't need global in your example, because you are in the global scope anyway.
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.