Furthermore, Pericles introduced or extended the practice of supplying all the citizens with free tickets to the theatre and other places of amusement, and of banqueting the people on festival days at the public expense. STRENGTH AND WEAKNESS OF THE ATHENIAN EMPIRE.--Under Pericles Athens had become the most powerful naval state in the world. In one of his last speeches, made at the outbreak of the Peloponnesian War, in which he recounts the resources of the Athenian empire, Pericles says to his fellow-citizens: "There is not now a king, there is not any nation in the universal world, able to withstand that navy which at this juncture you can launch out to sea." But the most significant feature of this new imperial power was the combination of these vast material resources with the most imposing display of intellectual resources that the world had ever witnessed. Never before had there been such a union of the material and intellectual elements of civilization at the seat of empire. Literature and art had been carried to the utmost perfection possible to human genius. Art was represented by the inimitable creations of Phidias and Polygnotus. The drama was illustrated by the incomparable tragedies of Æschylus, Sophocles, and Euripides, and by the comedies of Aristophanes, while the writing of the world's annals had become an art in the graceful narrations of Herodotus. But there were elements of weakness in the splendid imperial structure. The subject cities of the empire were the slaves of Athens. To her they paid tribute. To her courts they were dragged for trial. Naturally they regarded Athens as the destroyer of Hellenic liberties, and watched impatiently for the first favorable moment to revolt, and throw off the hateful yoke that she had imposed upon them. Hence the Athenian empire rested upon a foundation of sand. Had Athens, instead of enslaving her confederates of the Delian league, only been able to find out some way of retaining them as allies in an equal union,--a great and perhaps impossible task in that age of the world,--as head of the federated Greek race, she might have secured for Hellas the sovereignty of the Mediterranean, and the history of Rome might have ended with the first century of the Republic. Furthermore, in his system of payment for the most common public services, and of wholesale public gratuities, Pericles had introduced or encouraged practices that had the same demoralizing effects upon the Athenians that the free distribution of grain at Rome had upon the Roman populace. These pernicious customs cast discredit upon labor, destroyed frugality, and fostered idleness, thus sapping the virtues and strength of the Athenian democracy. Illustrations of these weaknesses, as well as of the strength of the Athenian empire, will be afforded by the great struggle between Athens and Sparta known as the Peloponnesian War, the causes and chief incidents of which we shall next rehearse. CHAPTER XV.