Generally it would be better to pass info to the script via a parameter rather than a global variable. But if that is what you need to do and you want automatic cleanup of the variable then introduce a new scope like so.
You can scope variables to functions and scripts.
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.