I like Dan's idea, so I expanded on it (quite a bit). You should be able to paste this into a text editor and watch it work.
So on your select changes you could fire classifyCategories - of course you'll need to write something to hide the selects that don't match the parent category but this might help you in the row classifying.
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.