Does there have to be hamartia in Modern Tragedies?

'Hamartia' as referred to by Aristotle in his Poetics is an 'error' or 'flaw' that makes the tragic protagonist a victim of fatal circumstances. Oedipus killed Laius and became the king of Thebes and married Laius's widow, Jocaste, without knowing that he had committed an error of killing his father and marrying his mother for which Thebes had to suffer from plague.

'Hamartia', meaning 'beside the mark', was a term that Aristotle borrowed from the field of archery; it was an error born of 'hubris', i.e. 'pride' which goes before a fall. It was an intellectual error, not a moral failing. A towering personality belonging to high station like Oedipus or Agamemnon was still prone to such error leading to reversal of fortunes.

In modern social drama, e.g. Galsworthy's Justice or Arthur Miller's The Death of a Salesman, 'hamartia' does have little significance. The protagonist--a junior clerk or a humble salesman--pitted against a cruel society is too ordinary to be capable of any such intellectual error, that also born of exceeding self-consciousness. This absence of 'hamartia' may also be the reason why the protagonist in a modern social tragedy tends to be more pathetic rather than tragic.