Death of a Salesman addresses loss of identity and a man's inability to accept change within himself and society. The play is a montage of memories, dreams, confrontations, and arguments, all of which make up the last 24 hours of Willy Loman's life. The three major themes within the play are denial, contradiction, and order versus disorder.
Each member of the Loman family is living in denial or perpetuating a cycle of denial for others. Willy Loman is incapable of accepting the fact that he is a mediocre salesman. Instead Willy strives for his version of the American dream — success and notoriety — even if he is forced to deny reality in order to achieve it. Instead of acknowledging that he is not a well-known success, Willy retreats into the past and chooses to relive past memories and events in which he is perceived as successful.
For example, Willy's favorite memory is of Biff's last football game because Biff vows to make a touchdown just for him. In this scene in the past, Willy can hardly wait to tell the story to his buyers. He considers himself famous as a result of his son's pride in him. Willy's sons, Biff and Happy, adopt Willy's habit of denying or manipulating reality and practice it all of their lives, much to their detriment. It is only at the end of the play that Biff admits he has been a "phony" too, just like Willy. Linda is the only character that recognizes the Loman family lives in denial; however, she goes along with Willy's fantasies in order to preserve his fragile mental state.
The second major theme of the play is contradiction. Throughout the play, Willy's behavior is riddled with inconsistencies. In fact, the only thing consistent about Willy is his inconsistency. From the very beginning of Act I, Scene 1, Willy reveals this tendency. He labels Biff a "lazy bum" but then contradicts himself two lines later when he states, "And such a hard worker. There's one thing about Biff — he's not lazy." Willy's contradictions often confuse audiences at the beginning of the play; however, they soon become a trademark of his character. Willy's inconsistent behavior is the result of his inability to accept reality and his tendency to manipulate or re-create the past in an attempt to escape the present. For example, Willy cannot resign himself to the fact that Biff no longer respects him because of Willy's affair. Rather than admit that their relationship is irreconcilable, Willy retreats to a previous time when Biff admired and respected him. As the play continues, Willy disassociates himself more and more from the present as his problems become too numerous to deal with.
The third major theme of the play, which is order versus disorder, results from Willy's retreats into the past. Each time Willy loses himself in the past, he does so in order to deny the present, especially if the present is too difficult to accept. As the play progresses, Willy spends more and more time in the past as a means of reestablishing order in his life. The more fragmented and disastrous reality becomes, the more necessary it is for Willy to create an alternative reality, even if it requires him to live solely in the past. This is demonstrated immediately after Willy is fired. Ben appears, and Willy confides "nothing's working out. I don't know what to do." Ben quickly shifts the conversation to Alaska and offers Willy a job. Linda appears and convinces Willy that he should stay in sales, just like Dave Singleman. Willy's confidence quickly resurfaces, and he is confident that he has made the right decision by turning down Ben's offer; he is certain he will be a success like Singleman. Thus, Willy's memory has distracted him from the reality of losing his job.
Denial, contradiction, and the quest for order versus disorder comprise the three major themes of Death of a Salesman. All three themes work together to create a dreamlike atmosphere in which the audience watches a man's identity and mental stability slip away. The play continues to affect audiences because it allows them to hold a mirror up to themselves. Willy's self-deprecation, sense of failure, and overwhelming regret are emotions that an audience can relate to because everyone has experienced them at one time or another. Individuals continue to react to Death of a Salesman because Willy's situation is not unique: He made a mistake — a mistake that irrevocably changed his relationship with the people he loves most — and when all of his attempts to eradicate his mistake fail, he makes one grand attempt to correct the mistake. Willy vehemently denies Biff's claim that they are both common, ordinary people, but ironically, it is the universality of the play which makes it so enduring. Biff's statement, "I'm a dime a dozen, and so are you" is true after all.