There is no one particular pokemon that is the rarest. Legendary pokemon and special pokemon (metallic,dark etc) are generally rarer. So, shiny lugia is as rare as a shiny kyogre, but rarer than a normal lugia or a ghostly abra.
More.
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.