Require "getPid.pl" evaluates the code contained in getPid.pl . So you actually call the pidGetter() function twice: in the require 'd script and in the main script. As $ARGV0 is undef inside the require 'd script, you get the warning.
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.