An error 500 is a "internal server error". This basically means that something on the server side has failed, it's just a very generic error message. Basically it can be everything, it's not only limited to your script.
It could be a Apache module error or anything else that refuses your WebServer software to handle the request without any fatal failures.
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.