There never was a people which made the principle that all its citizens were equal a more live reality than the Athenians made it; and no state to my knowledge was more cunningly contrived to insure the government of the people than was theirs. Yet they became imperialists with ardor and conviction, and with this much of logical consequence, that, while they believed in democracy for everybody, they did not doubt that the Athenians had earned the right to rule both Greeks and barbarians by the acquisition of superior culture. Equality among its citizens Athens carefully distinguished from equality among all men. The foundations of Athenian democracy and empire were laid by Themistocles, whose figure moves weird and gigantic through the golden mist in which Herodotus has enveloped the great Persian War. And it was this genial statesman, to whose unerring skill in discerning the course of coming events the austere historian Thucydides pays a rare tribute, who mapped out for his city the foreign policy by which it had the best chance of realizing its imperial ambition. Let it use its great fleet, which by fifteen years of persistent advocacy he had led the Athenians to build, as its arm of offense, and its impregnable walls, which he had enabled the Athenians to construct despite the treacherous opposition of Sparta, as a bulwark of defense and a basis for timely advance against its powerful continental rivals. Let it utilize the wave of democratic fervor then sweeping through Greece to consolidate its power within the Confederacy of Delos and to undermine and eventually to overthrow the leadership which Sparta, by the support of dying mediæval aristocracies, had hitherto possessed in Hellenic affairs. Let it make peace on advantageous terms with Persia; use the liberty thus secured to break the power of Sparta, and, on the basis of a consolidated Hellas, strike boldly for Athenian dominion of the world. It seems almost incredible that a clear-headed man should have entertained a programme of such magnitude. But we must remember that never had human beings more clearly performed the obviously miraculous. _We_ know, on the authority of a German military expert,[19] that, had the host which followed Xerxes to Athens numbered the 5,283,220 men attributed to it by Herodotus "without taking count of women cooks, concubines, eunuchs, beasts of burden, cattle, and Indian dogs," its rear guard must have been still filing out of Sardis while its van was vainly storming Thermopylæ. But what Herodotus reports is what the Athenians believed. They had met and routed the might of all Asia. They had mastered in fair fight the conquerors of all other peoples. The world was theirs: it was merely a question of taking possession.