The golden age of poetry finds its materials in the age of iron. This age begins when poetry begins to be retrospective; when something like a more extended system of civil polity is established; when personal strength and courage avail less to the aggrandizing of their possessor and to the making and marring of kings and kingdoms, and are checked by organized bodies, social institutions, and hereditary successions. Men also live more in the light of truth and within the interchange of observation; and thus perceive that the agency of gods and genii is not so frequent among themselves as, to judge from the songs and legends of the past time, it was among their ancestors. From these two circumstances, really diminished personal power, and apparently diminished familiarity with gods and genii, they very easily and naturally deduce two conclusions: 1st, That men are degenerated, and 2nd, That they are less in favour with the gods. The people of the petty states and colonies, which have now acquired stability and form, which owed their origin and first prosperity to the talents and courage of a single chief, magnify their founder through the mists of distance and tradition, and perceive him achieving wonders with a god or goddess always at his elbow. They find his name and his exploits thus magnified and accompanied in their traditionary songs, which are their only memorials. All that is said of him is in this character. There is nothing to contradict it. The man and his exploits and his tutelary deities are mixed and blended in one invariable association. The marvellous too is very much like a snowball: it grows as it rolls downward, till the little nucleus of truth which began its descent from the summit is hidden in the accumulation of superinduced hyperbole.

The Four Ages of Poetry by  Thomas Love Peacock [1820]