Haskell type classes & multiple files?

I don't think I would use a type class here. When you have a small and limited set of cases you wish to work on, it's much simpler to just use an algebraic data type.

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.