It all depends on your definition of what a RIA (Rich Internet Application) really is. To some, an AJAX enable web application might fit the bill. To others, a RIA includes highly stylized elements, a high level of interactivity, and a good bit of animation.
I think you want to consider this in terms of what your client app needs to do. If you can accomplish everything you need within rails, then there's no real need to go to flex. If you need more client-side control, then you can build a flex app and make the rails app just a web service.
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.