In short terms, your model performs all operations on the data (be it incoming, outgoing, database, files ... data), and your view should take care of displaying the data. The controller should call the necessary model methods to get the data ready to be passed to the view. The controller shouldn't perform any changes to the data, but it should test it to get the necessary action done properly.
I haven't worked with KohanaPHP but it looks like a 'rails-inspired' Framework. In the rails world it is generally considered best practice to have skinny controllers and fat models.
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.