The destiny or function of Rome in world-history was nothing more or less than the making of Europe. The modern family of European nations are her sons and daughters, and some of her daughters have grown up and married foreign husbands and given birth to offspring. For this great purpose it was necessary that the city itself should pass through the phases of growth, maturity and decay. In political terms, it was part of the Roman destiny to translate the civilisation of the city-state into that of the nation or territorial state. Having evolved the Province it was necessary that the City should expire. Conquest on a colossal scale was part of the programme, absolute centralised dominion was another part. For this purpose the change from republic to autocracy was necessary. Greece, as we have seen elsewhere, by her system of small states enclosed and protected by city walls, had been able, long before the world at large was nearly ripe for it, to develop a civilised culture with habits of thought and speech which are now called European or Occidental. It was in a highly concentrated social life and under artificial conditions that Athens had laid the foundation of all our arts, sciences and philosophies. It was, however, as we saw, impossible for the civic democracy to expand naturally. She could hold a little empire for a few years by means of precarious sea-power. She could throw off a few daughter cities made in her own likeness. But for missionary work on a large scale the city-state was not adapted. Something much larger than a city and much more single-minded than a democracy was necessary for that purpose. The genius of Alexander the Great, an autocrat and a semi-barbarian, enabled him to do much towards propagating Hellenism in the eastern part of the Mediterranean littoral. But his early death prevented the fulfilment of his task and the half of him that was Greek made him consider the planting of new Greek cities the only means for fulfilling it. Here then was the part which Rome had to play. She had to do for the West what Alexander had attempted for the East. In some respects her task was harder, for her work lay among warlike barbarians, but easier in that she had not to face the corrupting influence of a rival and more ancient civilisation.