Page:The Outline of History Vol 1.djvu/219

 as a tree grows; now losing a limb, now stripped by a storm, but always growing and resuming its growth. After four thousand years the warriors and conquerors were still going to and fro over this growing thing they did not understand, but men had now (330 ) got iron, horses, writing and computation, money, a greater variety of foods and textiles, a wider knowledge of their world.

The time that elapsed between the empire of Sargon I and the conquest of Babylon by Alexander the Great was as long, be it noted, at the least estimate, as the time from Alexander the Great to the present day. And before the time of Sargon, men had been settled in the Sumerian land, living in towns, worshipping in temples, following an orderly Neolithic agricultural life in an organized community for at least as long again. "Eridu, Lagash, Ur, Uruk, Larsa, have already an immemorial past when first they appear in history."

One of the most difficult things for both the writer and student of history is to sustain the sense of these time intervals and prevent these ages becoming shortened by perspective in his imagination. Half the duration of human civilization and the keys to all its chief institutions are to be found before Sargon I. Moreover, the reader cannot too often compare the scale of the dates in these latter fuller pages of man's history with the succession of countless generations to which the time diagrams given on pages 14, 60, and 89 bear witness.

§ 3

The story of the Nile valley from the dawn of its traceable history until the time of Alexander the Great is not very dissimilar from that of Babylonia; but while Babylonia lay open on every side to invasion, Egypt was protected by desert to the west and by desert and sea to the east, while to the south she had only negro peoples. Consequently her history is less broken by the invasions of strange races than is the history of Assyria and Babylon, and until towards the eighth century, when she fell under an Ethiopian dynasty, whenever a conqueror did come into her story, he came in from Asia by way of the Isthmus of Suez.