Tragic flaw is a literary term that refers to personality trait of a main character that leads to his downfall. A tragedy depicts the downfall and death of some important person and thereby arouse in the readers of such feeling s as pity, fear, awe, and terror. If Aristotle had lived in our times, he might have changed his mind about the tragic hero, and he might not have laid down the rule that the protagonist in tragedy should be a man of a very high rank. We live in democratic times when theories of social equality are in favours, even though there is no actual social equality anywhere in the world. Joe Keller belongs to the affluent class of society, and therefore he differs from the ordinary kind of human beings who constitute the majority in every country. The dialogue of all these persons is of the matter of fact kind. It is only the principal characters whose dialogue takes the plot of the play forward, while the subsidiary characters are useful chiefly in producing a realistic atmosphere in the play, though frank does make a slight contribution to the main plot by confirming Kate's irrational belief that her son Larry is still alive. Tragic flaws in miller all my son date certainly a tragedy in the literary sense of this word.All my son's is not exactly a powerful tragedy of kind written by such author as Marlowe. Shakespeare and Webster. But all my sons is certainly a moving and poignant play. The protagonist in this play is a manufacturer by the name of Joe Keller. It may here be pointed out that the protagonist in this play does not meet the requirements of a tragic hero as conceived by Aristotle.