I decided to use the RegionContext to propagate the IsActive state within the region.
This can be implemented as some sort of MessageBus or Mediator... You can Puplish events and everyone who needs be interested can subscribe to it... If you look in the prism samples you find an implementation or something in the docs...
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.