In ARITS, why is Walter's attitude about life unrealistic? I think I've read it somewhere maybe on sparknotes or pink monkey before but I looked again and can't find it.

Here's another one I did not answer last night because at first glance I thought you meant the Seven Arits, from The Book of the Dead! (Chakras) Having lived in Holland, ARITS also is a rijschool.

This morning, I realize you mean "A Raisin In The Sun." In the future, I would suggest not using Acronyms because these posts are not read in order and not everyone will know what you mean.

Walter is in a downward spiral, driven to the edge of insanity by the prospect of seeing his dream slip through his fingers. This also takes place during the conflicts of classic social conditions - race, religion, color, class distinction.