“My suggestion, from the various facts here marshalled, would be that the original home of civilisation in Babylonia was the strip of land from Nippur southward to the neighbourhood of Ur, and not, as has sometimes been argued, the region about Babylonia and northward to Sippara; while the latter region is in itself older, it does not seem to have been older as the home of civilised man.
“The ancestors of the civilisation of Babylonia seem to have come from the region between Nippur and what was then the coast of the Persian Gulf. This would accord also with the tradition preserved to us in later sources that civilisation came to Babylonia out of the Persian Gulf. Possibly Eridu, on the Arabian plateau near the western shore and not far from the head of what was then the Persian Gulf, may represent the oldest seat of that civilisation. However that may be, at a very early period Nippur became the centre of civilisation and religion, being founded at a time when everything below Ur probably was still under water. As early as the close, if not the beginning, of the seventh millennium B.C., this strip of land at the head of the then Persian Gulf seems to have been the home of the civilised men, and from here civilisation spread northward.”[f]
THE LAND
The land of the Euphrates and Tigris lies between the Iranian country on the east and the Syrio-Arabian district on the west, from the chain of mountains of the Zagros to the rocky heights of the Lebanon and the Syrian desert. From the mountains of Armenia, in which both rivers have their source, the land gradually declines to the plain, extending from the point of their union to where they fall into the Persian Gulf.
The upper-river beds, winding through a high-lying, sometimes fertile steppe country, are surrounded by heights, where plane and cypress groves alternate with green meads and a rich growth of many-coloured flowers and plants.
As the land grows flatter, these valleys widen to fertile pastures on the river-banks, whilst the wide central plain grows more and more bare and treeless, until it ends at last in a desert trodden only by a few wandering shepherds with their flocks, and full of ostriches, bustards, and wild game. This is known as the between-river (Mesopotamia) district, which extends into a wide plain of rich brown soil, about a hundred miles above the mouth, where the two rivers approach most nearly, and the banks touch the so-called Median wall.
This plain, famous for its uncommon fertility as well as for its historic importance, the “Shinar” Land of the Semites, and the Babylonia of the Greeks, is as rainless as Egypt, and would have dried up into a sandy desert, had not nature and human artifice contrived means of irrigation.
For in the spring, when the snow melts on the Armenian mountains, both rivers overflow their banks and water the thirsty land. This overflowing of the gently moving Euphrates is as regular as that of the Nile; the wide tract of water is unopposed in its inundation of the plain and, like the Nile, it deposits a rich mud soil, and man’s resources are called into play to aid nature by the artificial conduct of water and by means of dams to give the neighbouring district a share in the fertilising irrigation.
But the bed of the Tigris growing decidedly more narrow as it nears the sea, receives the devastating stream from the eastern and northern mountains, and the force of the waters transports the fertile soil from the fields and transforms the plains into a wide swampy land, covered with reeds and rushes.
The inhabitants, therefore, had the double task of stemming the force of the stream to prevent destructive inundations, and of securing a course for the fertilising waters by canals and lakes. So the Babylonian plains were sown with such a number of small and great canals, dams and ditches, that the waterworks and means of irrigation were a source of wonder and astonishment to the whole of antiquity. These canals, cut in every direction and decreasing in size until they were almost rivulets, were furnished with countless machines and pump-works. Many of these canals, which should have been kept free by continuous clearing from the stoppage of mud, were lost in the sand; others, emptying into the Tigris, increased its size, the nearer it approached the sea, while the waters of the Euphrates were decreased through the drain of the canals.[b]