Honesty
Honesty is does not seem to determine which characters are sympathetic and which are not in this novel in quite the same way that it does in others. Nick is able to admire Gatsby despite his knowledge of the man's illegal dealings and bootlegging. Ironically, it is the corrupt Daisy who takes pause at Gatsby's sordid past. Her indignation at his "dishonesty," however, is less moral than class-based. Her sense of why Gatsby should not behave in an immoral manner is based on what she expects from members of her milieu, rather than what she believes to be intrinsically right. The standards for honesty and morality seem to be dependent on class and gender in this novel. Tom finds his wife's infidelity intolerable, however, he does not hesitate to lie to her about his own affair.
Decay
Decay is a word that constantly comes up in The Great Gatsby, which is appropriate in a novel which centers around the death of the American Dream. Decay is most evident in the so-called "valley of ashes." With great virtuosity, Fitzgerald describes a barren wasteland which probably has little to do with the New York landscape and instead serves to comment on the downfall of American society. It seems that the American dream has been perverted, reversed. Gatsby lives in West Egg and Daisy in East Egg; therefore, Gatsby looks East with yearning, rather than West, the traditional direction of American frontier ambitions. Fitzgerald portrays the chauvinistic and racist Tom in a very negative light, clearly scoffing at his apocalyptic vision of the races intermarrying. Fitzgerald's implication seems to be that society has already decayed enough and requires no new twist.
Gender Roles
In some respects, Fitzgerald writes about gender roles in a quite conservative manner. In his novel, men work to earn money for the maintenance of the women. Men are dominant over women, especially in the case of Tom, who asserts his physical strength to subdue them. The only hint of a role reversal is in the pair of Nick and Jordan. Jordan's androgynous name and cool, collected style masculinize her more than any other female character. However, in the end, Nick does exert his dominance over her by ending the relationship. The women in the novel are an interesting group, because they do not divide into the traditional groups of Mary Magdalene and Madonna figures, instead, none of them are pure. Myrtle is the most obviously sensual, but the fact that Jordan and Daisy wear white dresses only highlights their corruption.
Violence
Violence is a key theme in The Great Gatsby, and is most embodied by the character of Tom. An ex-football player, he uses his immense physical strength to intimidate those around him. When Myrtle taunts him with his wife's name, he strikes her across the face. The other source of violence in the novel besides Tom are cars. A new commodity at the time that The Great Gatsby was published, Fitzgerald uses cars to symbolize the dangers of modernity and the dangers of wealth. The climax of the novel, the accident that kills Myrtle, is foreshadowed by the conversation between Nick and Jordan about how bad driving can cause explosive violence. The end of the novel, of course, consists of violence against Gatsby. The choice of handgun as a weapon suggests Gatsby's shady past, but it is symbolic that it is his love affair, not his business life, that kills Gatsby in the end.
Class
Class is an unusual theme for an American novel. It is more common to find references to it in European, especially British novels. However, the societies of East and West Egg are deeply divided by the difference between the noveau riche and the older moneyed families. Gatsby is aware of the existence of a class structure in America, because a true meritocracy would put him in touch with some of the finest people, but, as things stand, he is held at arm's length. Gatsby tries desperately to fake status, even buying British shirts and claiming to have attended Oxford in an attempt to justify his position in society. Ultimately, however, it is a class gulf that seperates Gatsby and Daisy, and cements the latter in her relationship to her husbad, who is from the same class as she is.
Religion
It is interesting that Fitzgerald chooses to use some religious tropes in a novel that focuses on the American Dream, a concept which leaves no room for religion save for the doctrine of individualism. The most obvious is the image of the "valley of ashes," which exemplifies America's moral state during the "Roaring Twenties." This wasteland is presided over by the empty eyes of an advertisement. Fitzgerald strongly implies that these are the eyes of God. This equation of religion with advertising and material gain are made even more terrifying by the fact that the eyes see nothing and can help no one (for example, this "God" can do nothing to prevent Myrtle or Gatsby's deaths).
World War I
Because The Great Gatsby is set in the Roaring Twenties, the topic of the Great War is unavoidable. The war was crucial to Gatsby's development, providing a brief period of social mobility which, Fitzgerald claims, quickly closed after the war. Gatsby only came into contact with a classy young debutante like Daisy as a result of the fact that he was a soldier and that no one could vouch for whether he was upper-class or not. The war provided him with further opportunities to see the world, and make some money in the service of a millionaire. Gatsby's opportunities closed up after the end of the war, however, when he found upon returning to America that the social structure there was every bit as rigid as it was in Europe. Unable to convince anyone that he is truly upper-class (although his participation in the war gave him some leeway about lying), Gatsby finds himself unable to break into East Egg society.
