The process that uses in oil refineries is fractional distillation . In this process several liquids are seperated at at particular temperature . In this process materials like petrol ,diesel,kerosene,paraffin wax etc are seperated.
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.