How moral and just is the world of The Great Gatsby?

The world of The Great Gatsby, put
simply, is not moral and just at all.  Looked at in a more sophisticated and complex
way, though, one would say the world of the novel is morally
ambiguous. 

The character of Gatsby is particularly
ambiguous.  In his daily actions, he is fair and just.  Polite almost to a fault, he is
somewhat full of self-doubt.  He is polite and thoughtful.  His flaw is that he believes
an illusion.  He dedicates his existence to a return to the past--his relationship with
Daisy.  But the relationship never really existed as Gatsby experienced it.  Daisy never
loved him as he loved her.  This doesn't make him immoral, however, only deluded and
naive.

Yet, he is also an organized crime figure.  One
can assume that his business in Chicago is not always run with the courtesy and
politeness Gatsby uses in his personal life.

Daisy is also
ambiguous.  She is a woman in a man's world.  As she tells Nick, she feels pain for her
daughter, since her daughter will face life in the same society she herself lives in. 
Her only hope of success and advancement will be to be a pretty little fool.  In other
words, to marry a wealthy man, as Daisy has had to do.  It's important to note that when
she rejects Gatsby at the end of the novel she rejects him because he asks more than she
is willing to give.  She won't announce that she has been pining for him all these years
and that she never loved Tom.  She doesn't reject him because of money--Gatsby has
plenty of that. 

Yet, she allows Gatsby to be blamed for
the accident that kills a human being and slinks away with Tom.  Nick the narrator also
interprets her character as a manipulator who enjoys messing with people's
lives. 

Like actuality, these two characters are mixtures
of immaturity and maturity, morality and immorality, intelligence and stupidity, good
and bad.   

As a whole, of course, the world of the novel
is not just.  Gatsby, who perhaps loves as all people should love, doesn't get the girl
and is killed for something he didn't do.  The Wilson's don't get what they deserve,
either--though they are anything but ideal characters, the consequences they suffer are
not just.  And Tom and Daisy walk away with their lives fully intact.  The novel is not
a fairy tale.  It's about as just as the real world.