Arthur Miller's classic American play, Death of a Salesman, exposes the relationship between gender relationships and dysfunctional family behaviors. In this play, the themes of guilt and innocence and of truth and falsehood are considered through the lens of family roles. Willy Loman, the salesman whose death culminates the play, is an anti-hero, indeed the most classic of anti-heroes. According to an article on the play in Modern World Drama, Willy is "a rounded and psychologically motivated individual" who "embodies the stupidity, immorality, self-delusion, and failure of middle-class values." While his self-delusion is his primary flaw, this characteristic is not necessarily tragic since Willy neither fights against it nor attempts to turn it toward good. Dennis Welland in his book, Miller: The Playwright summarized this view, critiquing critics who believe that "Willy Loman's sense of personal dignity was too precariously based to give him heroic stature." Although he is ordinary and his life in some ways tragic, he also chooses his fate. The article in Modern World Drama confirmed that "considerable disputation has centered on the play's qualification as genuine tragedy, as opposed to social drama."

Although Willy is dead by the end of the play, that is, not all deaths are truly tragic. The other characters respond to Willy's situation in the ways they do because they have different levels of access to knowledge about Willy and hence about themselves. An analysis of the relationships among these characters' insights and their responses will reveal the nature of their flawed family structure.

According to conventional standards, Biff, the older son of Willy and Linda, is the clearest failure. Despite the fact that he had been viewed as a gifted athlete and a boy with a potentially great future, Biff has been unable as an adult to succeed or even persevere at any professional challenge. Before the play opens, he had been living out west, drifting from one low-paying cowboy job to another, experiencing neither financial nor social stability. Back in New York, he is staying with his parents but seems particularly aimless, although he does gesture toward re-establishing some business contacts. Although one could speculate that the Loman family dynamics in general have influenced Biff toward ineffectuality, as the play progresses readers understand that one specific biographical moment (and his willingness to keep this moment secret) provides the key to his puzzling failure.

Near the end of the play, Bernard, Willy's nephew, asks Willy about this crucial incident. Although Biff had already accepted an athletic scholarship to the University of Virginia, he failed math his last semester in high school; his best option was to make the course up during summer school. Before he makes this decision, Biff visits Willy, who is in Boston on business. According to Bernard, Biff "came back after that month and took his sneakers—remember those sneakers with 'University of Virginia' printed on them? He was so proud of those, wore them every day. And he took them down in the cellar, and burned them up in the furnace. We had a fist fight. It lasted at least half an hour. Just the two of us, punching each other down the cellar, and crying right through it. I've often thought of how strange it was that I knew he'd given up his life. What happened in Boston, Willy?" Willy responds defensively: "What are you trying to do, blame it on me?"

What had happened, of course, as Willy subsequently remembers and as he has probably remembered frequently during the intervening years, was that Biff had discovered Willy in the midst of an extramarital affair. In contrast to Linda, who frequently appears with stockings that need mending, this other woman receives gifts of expensive stockings from Willy. The existence of this woman (and perhaps others like her) is one factor contributing to the financial strain of the Loman family. Biff understands this instantly, and he also understands the depth of Willy's betrayal of Linda—and the family as a whole. The trust Biff had given Willy now seems misplaced. Indeed, according to the flashbacks within the play, the young Biff and Happy had nearly idolized Willy, so this betrayal while Biff is yet an adolescent is particularly poignant. As Biff is about to make a momentous life decision, in other words, he is confronted with duplicity from the man he had looked to as a role model. Yet Biff shares this knowledge with no one; instead this secret becomes the controlling element of his own life. 

When Biff does attempt to tell the truth, not about Willy's affair but about his own life, Willy and Happy both resist him. "Let's hold on to the facts tonight, Pop," Biff says, indicating that "the facts" are slippery in their hands. The outright lies members of the Loman family tell, that is, come more easily because they also exaggerate some facts and minimize others. Although many of their stories may be eventually founded in truth, that truth is so covered with their euphemistic interpretations that it is barely recognizable. The stories the family has told have become nearly indistinguishable from the real circumstances of their lives. Trying to separate reality from fantasy, Biff says, "facts about my life came back to me. Who was it, Pop? Who ever said I was a salesman with Oliver?" But Willy refuses to acknowledge the substance of the question: "Well, you were." Biff contradicts him, as determined to acknowledge the truth as Willy is to deny it: "No, Dad, I was a shipping clerk." Willy still declines to accept this fact without the gloss of embellishment: "you were practically" a salesman.

Later, the conversation among the three men reveals that similar embellishments continue to characterize their lives. "We never told the truth for ten minutes in this house!" Biff proclaims. When Happy protests that they "always told the truth," Biff cites a current family lie: "You big blow, are you the assistant buyer? You're one of the two assistants to the assistant, aren't you?" But Happy continues the family habit: "Well, I'm practically..."

...

The most profound secret of the play, however, is of course Willy's apparent obsession with suicide. He has been involved in several inexplicable automobile accidents, and he has perhaps planned to asphyxiate himself by attaching a rubber tube to their gas water heater. Linda has discovered this tube and has revealed her discovery to her sons, but she forbids them from addressing the subject directly with Willy, for she believes such a confrontation will make him feel ashamed. This secret is hence ironically acknowledged by everyone except the one whose secret it is—Willy. When he does finally succeed in killing himself, his act can be interpreted as a culmination of secrets, secrets which are compounded through lies because they have been created through lies. Welland suggested that Willy's suicide results from his affair—-"To argue that in these days of relaxed social morals one minor marital infidelity hardly constitutes grounds for suicide is, paradoxically, to add weight to the theme in the context of this play: for Willy Loman it is enough." His affair is certainly one factor in his decision, but it is a factor because he had been found out by his son, and because others are now starting to question him. So although these secrets include his affair(s) and Biffs knowledge of this aspect of his life, they also include his failure as a salesman and the subsequent failures of his sons.