Thin itself depends on Rack. And because Thin will load itself before it loads your application, the most recent version of Rack will already be loaded when bundler first enters the picture.
You can find information on heroku's site about using thin. Also they are recommend using thin. http://devcenter.heroku.com/articles/rails3#webserver.
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.