The Peloponnesus presents us with one of the most striking instances of the influence exercised by the nature of the country upon the historical development of its inhabitants. Held to Greece by a mere thread, and defended at its entrance by a double bulwark of mountains, this “isle of Pelops” naturally became the seat of independent tribes at a time when armies still recoiled from natural obstacles. The isthmus was open as a commercial high-road, but it was closed against invaders. The relief of the peninsula satisfactorily explains the distribution of the tribes inhabiting it, and the part they played in history. The whole of the interior basin, which has no visible outlets towards the sea, naturally became the home of a tribe who, like the Arcadians, held no intercourse with their neighbours, and hardly any amongst themselves. Corinth, Sicyon, and Achaia occupied the seashore on the northern slopes of the mountains, but were separated by high transversal chains. The inhabitants of these isolated valleys long remained strangers to each other, and when at length they combined to resist the invader, it was too late. Elis, in the west, with its wide valleys and its insalubrious plains extending along a coast having no havens, naturally played but a secondary part {65} in the history of the peninsula. Its inhabitants, exposed to invasions, owing to their country being without natural defences, would soon have been enslaved, had they not placed themselves under the protection of all the rest of Greece by converting their plain of Olympia into a place of meeting, where the Hellenes of Europe and of Asia, from the continent and from the islands, met for a few days’ festival to forget their rivalries and animosities. The basin of Argos and the mountain peninsula of Argolis, on the eastern side of the Peloponnesus, on the other hand, are districts having natural boundaries, and are easily defended. Hence the Argolians were able to maintain their autonomy for centuries, and even in the Homeric age they exercised a sort of hegemony over the remainder of Greece. The Spartans were their successors. The country in which they established themselves possessed the double advantage of being secure against every attack, and of furnishing all they stood in need of. Having firmly established themselves in the beautiful valley of the Eurotas, they found no difficulty in extending their power to the seashore, and to the unfortunate Helos. At a later date they crossed the heights of the Taygetus, and descended into the plains of Messenia. That portion of Greece likewise formed a natural basin, protected by elevated mountain ramparts; and the Messenians, who were kinsmen of the Spartans and their equals in bravery, were thus able to resist for a century. At length they fell, and all the Southern Peloponnesus acknowledged the supremacy of Sparta, which was now in a position to assert its authority over the whole of Greece. Then it was that the