In general you use a NSSortDescriptor to define the sort of collections like arrays or Core Data. You call the sort from the collection object itself.
You can do sorting of date by comparing two dates. For that you should use. NSComparisonResult class.
NSComparisonResult result=date1 compare:date2.
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.