Nick Carraway, the novel's narrator, is a young man who was born into a conservative, well established, but not wealthy, Midwestern family. After attending college and serving in World War I, Nick comes back home, but he finds the Midwest seems out of the mainstream of life as he has come to know it out in the world. With his family's financial backing for one year, Nick goes to New York to learn the bond business and establish a career in the East. Nick's work ethic is strong; he works hard, but he also becomes involved in the lives of his mysterious neighbor, Jay Gatsby, and his distant cousin Daisy Buchanan and her husband Tom (whom Nick had known in college).
In addition to functioning in the novel as the narrator who observes and reports, Nick plays another important role. Through Nick, Fitzgerald establishes and develops a sharp contrast between the East and the Midwest. It is through this contrast that the novel's major theme is developed: the corruption of the American Dream in modern society. Nick becomes Fitzgerald's voice of moral authority.
When Nick moves to the East, he is a young man with an open mind and a non-judgmental nature. He is also a young man who was shaped by his family's Midwestern values. Nick leaves the Midwest never intending to return; however, even though his family had financed him for a year, Nick leaves New York to go back home after only a few months. Once he is back home, after many months he is still dealing with all that he experienced and observed in the East, and he is no longer a man who reserves judgment.
Nick makes strong moral judgments as a result of his time in New York. Primarily, he rejects the amorality and corruption of the Buchanans. The last time he sees Tom, after Gatsby's death, Nick does not want even to shake his hand; he does shake Tom's hand because he knows that Tom is so morally bankrupt he wouldn't even understand the gesture. Nick is a decent person; he is sickened by the "foul dust that floated in the wake of [Gatsby's] dreams."
Fitzgerald began the novel with a discussion of the Midwest, and in the novel's final chapter, he included a beautiful passage in which Nick talks about "my middle-west," a place where dwellings are still called through decades by a family's name." By turning his back on the East and going home, Nick makes Fitzgerald's moral statement.
Nick Carroway is a man in his early thirties who is from the Mid-West and decides to move to Long Island, New York for the summer of 1922 to sort of test the area out and see if this is a place that he would like to live. He is a stockbroker and was educated at Yale University. He obviously comes from a wealthy family, although not as wealthy as some of the other characters in the novel, because of the advice that he is given by his father. Nick is told by his father that he can not really judge people based upon his own life because he has had many privileges that others have not had.
Nick functions as the narrator and is the link between the characters and the reader because he supplies all of the information that is necessary in order to understand the characters and the events that take place. Nick is also the character that allows the reader to form his/her judgments on other characters because Nick relays the information back to the reader – whether truthful or not.
Nick is the moral voice-the man you can trust to tell this story accurately. If this novel were written in the 3rd person it would be an ordinary story. How can a reader be made to feel for a group of bored, superannuated nincompoops who have nothing better to do with their lives than to create bogus romantic scenarios? By giving them a foil-a guy who is an everyman and can point out, with irony, their privilegedworld as it slams up against what everyone else would call normal, we can see these people as human and even care about them. Without Nick, Gatsby would be truly friendless.