When Persia abandoned direct sovereignty over the Anatolian littoral she suffered little commercial loss and became more secure. It is clear that her satraps continued to manage the western trade and equally clear that the wealth of her empire increased in greater ratio than that of the Greek cities. There is little evidence for Hellenic commercial expansion consequent on the Persian wars, but much for continued and even increasing Hellenic poverty. In the event Persia found herself in a position almost to regain by gold what she had lost by battle, and to exercise a financial influence on Greece greater and longer lasting than she ever established by arms. Moreover, her empire was less likely to be attacked when it was limited by the western edge of the Anatolian plateau, and no longer tried to hold any European territory. There is a geographical diversity between the Anatolian littoral and the plateau. In all ages the latter alone has been an integral part of inner Asia, and the society and politics of the one have remained distinct from those of the other. The strong frontier of Asia at its western peninsular extremity lies not on, but behind the coast. At the same time, although their immediate results to the Persian Empire were not very hurtful, those abortive expeditions to Europe had sown the seeds of ultimate catastrophe. As a direct consequence of them the Greeks acquired consciousness of their own fighting value on both land and sea as compared with the peoples of inner Asia and the Phoenicians. Their former fear of numerical superiorities was allayed, and much of the mystery, which had hitherto magnified and shielded Oriental power, was dissipated. No less obviously those expeditions served to suggest to the Greeks for the first time that there existed both a common enemy of all their race and an external field for their own common encroachment and plundering. So far as an idea of nationality was destined ever to be operative on Greek minds it would draw its inspiration thenceforward from a sense of common superiority and common hostility to the Oriental. Persia, in a word, had laid the foundations and promoted the development of a Greek nationality in a common ambition directed against herself. It was her fate also, by forcing Athens into the front of the Greek states, to give the nascent nation the most inspiriting and enterprising of leaders--the one most fertile in imperial ideas and most apt to proceed to their realization: and in her retreat before that nation she drew her pursuer into a world which, had she herself never advanced into Europe, would probably not have seen him for centuries to come.