You don't included the definition of jqGrid in your question and we can't see the place where the setGridParam are called. First of all you should use setGridParam after the jqGrid is created, but before the request will be send. If you will change the postData the next jqGrid request can use new parameter.
So one use typically.
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.