An eye that swells and goes from black to brown may very likely have been injured and is hemorrhaging. The good news is that it does sometimes resolve itself, the bad news is that there is very little that can be done if it doesn't. However, even if it doesn't resolve itself, as long as it doesn't get infected then the rat can still live to die of old age, he just won't be able to see -- or will see very little -- out of that eye.
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.