The oriental origin of the ancient myth
In historical research, until the second half of the 19th century, the view that Hesiod's theory of the ages reflected real facts of prehistory in Greece prevailed. Proponents of this view were Friedrich von Schlegel, Karl Friedrich Hermann and Johann Wilhelm Klingender. The correct counter-opinion, according to which it is a myth without a historical core, was held by Ludwig Preller; at that time it was still a minority position.
In the 20th century, new points of view came to the fore when comparative mythology and religious studies began to take up the subject and uncovered the oriental origins of the saga. Axel Olrik and Richard Reitzenstein played a pioneering role in this. In more recent research, it has become generally accepted that the concept of the metal myth is of oriental origin. However, the question of the extent to which Hesiod's account is a new creation in its own right and the extent to which it depends on older mythical material, in particular the Near Eastern tradition, is controversial. One of Hesiod's own achievements seems to be the linking of the oriental metal myth with the ideas of the time of Kronos that already existed in Greece.
Middle Eastern metal myths
The Near Eastern traditions, like the Greek ones, follow the scheme of epochs according to metals of descending quality. However, they do not deal with a completely fictitious, legendary past, but with known historical conditions of the time since the 6th century BC.
In the biblical book of Daniel, a (divinely inspired) dream is described in which a statue made of various metals appears. The rank of the metals decreases from top to bottom: The head is gold, the chest and arms are silver, etc. The metals symbolize four successive world empires, the first and most important of which, the golden one, is the New Babylonian Empire of King Nebuchadnezzar II.
In the first book of the Persian prophecy Bahman Yašt (6th century AD, but the material comes from much older tradition) a variant from Zoroastrianism is reproduced: Zarathustra sees in a dream a tree with four branches of different metals, representing future great epochs of history, beginning with the golden one, the early days of the Achaemenid Empire. In the golden age, the true religion prevails, and continues to dominate in the two following eras. It is not until the fourth and final age (Iron) that the collapse of morality occurs, with consequences similar to those in the Greek myth. A more recent version of Persian prophecy has come down to us in the second book of Bahman Yašt. It offers a more detailed account and expands the number of epochs named after metals to seven.
Far Eastern Models
In India, a cyclical world-age model has been the only authoritative basis of historical and cultural philosophy for thousands of years. This basic concept has shaped the conception of history in the Vedic religion and Hinduism as well as in Buddhism and Jainism. Through Buddhism, variants of the age model have spread to China and other Far Eastern countries.
According to the Indian world age doctrine, the world is subject to an eternal cosmic cycle in which four ages (yugas) take turns. They are not associated with metals, but with the colors that the god Vishnu assumes in each of the yugas (white, red, yellow and black). The first Yuga is the Krita Yuga ("Perfect Age," also called the Satya Yuga), to which the white color belongs. In the epic Mahabharata the characteristics of this ideal epoch are given. They are similar to those of the ancient European myth: people need not toil, for their desires are effortlessly fulfilled; want, disease, decay, misery, discord, envy, hatred, and treachery are unknown; trade is not carried on; labor is unnecessary. In the succeeding ages there is a progressive decline in the faculties and decay of religion and virtues. The last of these, the black Kali Yuga, forms, as in ancient mythology, the sharpest contrast to the perfect beginning: hatred and criminal violence prevail.
Norse mythology
In Norse mythology, too, the term "golden age" occurs in the creation story. However, it is only attested in the Gylfaginning, which forms the first part of the Snorra-Edda ("Prose-Edda") and was written in Old Icelandic in the first half of the 13th century. In the 14th chapter, the gods are depicted as good craftsmen. They are said to have worked various materials, besides ore, stone, and wood, especially gold, so that they had all their household utensils and furnishings of gold, and this epoch is called the gold age, until it was spoiled by the arrival of certain women from Jötunheim. The gold age is called gullaldr. The use of aldr instead of-as might be expected from a term of Old Norse origin-ǫld suggests that the term gullaldr comes not from a folk tale but from a scholarly tradition. Very likely it is based on Ovid's aetas aurea. Thus the Norse Golden Age term is not of independent origin, but taken from an ancient Roman version of the Golden Age myth. In terms of content, however, there is no correspondence between the Gylfaginning narrative and the Near Eastern and ancient versions of the metal myth.
Intercultural comparison and reconstruction of the primeval myth
Both in Europe and in the Near and Far East, it is a mythical interpretation of history that assumes several successive world ages (or in the Near East: world empires or historical epochs). The ages are characterized by their respective human genera, which differ in terms of their cultural and civilizational levels. The first and best is the Golden Age or Age of the Golden Race, to which in India corresponds the Krita Yuga. This is followed by the Silver Age or Age, etc. Even the second age brings deterioration, which continues later. The conclusion is the Iron Age, which is still continuing, by far the worst of all, with which the lowest possible state of cultural decay is reached. It is therefore the opposite of the idea of progress. The doctrine of the ages is the mythical expression of a culturally pessimistic philosophy of history, which conceives of historical development primarily as a process of natural decay of culture or civilization.
The Indian doctrine of the ages does not appear in the Vedas. Like the Iranian and Jewish versions, it shows similarities with Babylonian cosmography, which points to Babylonian origin. Hesiod's metal scheme, which came to Greece from Asia through Phoenician mediation (the extent and details of Asian influence on Hesiod are disputed), is also Babylonian in origin. Thus an extraordinarily broad Eurasian context of tradition emerges: One can infer a Babylonian primordial myth involving four descending and cyclical successive world ages symbolized by four metals. In each age one of four planetary gods rules. After the end of the world at the end of the fourth, worst age (to which the present of the myth-teller belongs), there is an abrupt return to a new Golden or Perfect Age, with which the cycle is continued. The four colours, which in the Indian tradition stand for the four ages, have there taken over the role of the metals.
Hesiod's version shows some modifications compared to the original myth. In particular, the scheme of the original four metal ages is extended by a fifth age, the epoch of the Heroes, which comes next to last in the chronological order. The Heroes Age forms a foreign body in the scheme, as it is the only one not to bear a metal name, and brings some improvement over the previous age. The destruction and re-creation of mankind at the change of epoch is also an innovation in the variant handed down by Hesiod.
Jean-Pierre Vernant has put forward a structuralist interpretation that has provoked a lively debate, especially in France. According to his hypothesis, the different genders (human species) of the chronologically successive mythical ages reflect a social stratification of society. According to this, Hesiod's golden and silver genders correspond to the rulers (the golden to the good rulers, the silver to the bad), the third and fourth genders are to be interpreted as the warrior class, and the fifth (iron) gender represents the producers of goods. This hypothesis is controversial.