You can use a temp table as "mu is too short" suggested but if you only need the result in a single "main" query and you are using PostgreSQL 8.4 or higher you can also use with queries.
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.