Once again, the starting-point is a migration. On the high plateau which is the heart of modern Iran there were settlements in 5000 BC, but the word ‘Iran’ (which does not appear until about AD 600) in its oldest form means ‘land of the Aryans’ and it is somewhere around 1000 BC, with an irruption of Aryan tribes from the north, that the history of the Persian empire begins. In Iran, as in India, the impact of the Aryans was to prove ineffaceable and founded a long-enduring tradition. Among their tribes two – especially vigorous and powerful – have been remembered further west by their biblical names as the Medes and Persians. The Medes moved west and north-west to Media; their great age came at the beginning of the sixth century BC, after they had overthrown Assyria, their neighbour. The Persians went south towards the Gulf, establishing themselves in Khuzistan (on the edge of the Tigris valley and in the old kingdom of Elam) and Fars, the Persia of the ancients.
Oral tradition preserves a story of legendary kings more important for the light it throws on later Persian attitudes to kingship than as history. It was none the less from the Persian dynasty of the Achaemenids that there descended the first king of a united Persia – anachronistic though this term is. He was Cyrus, the conqueror of Babylon. In 549 BC he humbled the last independent king of the Medes and thenceforth the boundaries of conquest rolled outwards, swallowing Babylon and advancing through Asia Minor to the sea, dropping down into Syria and Palestine. Only in the east (where he was eventually killed fighting the Scythians) did Cyrus find it difficult to stabilize his frontiers, though he crossed the Hindu Kush and set up some sort of supremacy over the region of Gandhara, north of the Jhelum.
This was the largest empire the world had seen until that time. Its style was different from its predecessors’; the savagery of the Assyrians seems muted. At least brutality was not celebrated in official art and Cyrus was careful to respect the institutions and ways of his new subjects. The result was a diverse empire, but a powerful one, commanding loyalties of a kind lacking to its predecessors. There are some notable religious symptoms: the protection of Marduk was solicited for Cyrus’s assumption of the Babylonian kingship, and at Jerusalem he launched the rebuilding of the Temple. A Jewish prophet saw in his victories God’s hand, named him the Lord’s anointed and gloated over the fate of the old enemy, Babylon: ‘Let now the astrologers, the stargazers, the monthly prognosticators, stand up, and save thee from these things that shall come upon thee’ (Isaiah 47: 13).
Cyrus’s success owed much to the material resources of his kingdom. It was rich in minerals, above all in iron, and in the high pastures of the valleys lay a great reserve of horses and cavalrymen. Yet it is impossible to resist the conclusion that sheer personal ability also counted for much; Cyrus lives as a world-historical figure, recognized as such by other would-be conquerors who were to strive in the next few centuries to emulate him. He based his government upon provincial governors who were the forebears of the later Persian satraps, and required from his subject provinces little beyond tribute – usually in gold, which replenished the treasuries of Persia – and obedience.
Thus began the empire which, though with setbacks aplenty, provided for nearly two centuries a framework for the Middle East, sheltering a great cultural tradition which grew to nourish itself both from Asia and Europe. Large areas knew longer periods of peace under it than they had for centuries and it was in many ways a beautiful and gentle civilization. Greeks had been told by Herodotus that the Persians loved flowers and there are many things we could do without more easily than the tulip, which we owe to them. Cyrus’s son added Egypt to the empire; yet he died before he could deal with a pretender to the throne whose attempts encouraged Medes and Babylonians to seek to recover their independence. The restorer of Cyrus’s heritage was a young man who claimed Achaemenid descent, Darius.