=Slavery.=--Moreover, the wealth of the nation was not fairly distributed but was more and more in the hands of the favored few, the great nobles, and their friends. The fields were not tilled by independent farmers. There were, instead, a few great estates which were rented out to tenants. The actual work, both on the fields and in the towns, was more and more performed by slaves. Some of these were captives who had been taken in war. Others were native Babylonians who had been sold into slavery for debt. So it had come about that Babylonian society had set like plaster into a hard mold with the king and the wealthy nobles on top and the poor peasants and slaves below. This state of things was fastened all the more firmly on the people by strong kings such as Hammurabi, who lived about B.C. 2000 and who unified the country under a powerful central government with his own city, Babylon, as the capital. A SHEPHERD WITH IDEALS About the time of Hammurabi's reign, if we follow the account related in the book of Genesis, there lived among the nomads on the plains west of the city of Ur a man named Abraham. If Hammurabi ever heard of him, which is improbable, he looked down upon him as of no account. Yet Abraham wielded a greater influence for the future welfare of humanity than all the princes of Babylon. For, discontented with Babylonian life, he was the earliest pioneer in a movement toward a civilization of a different and better type. And the sons of Hammurabi have yet to reckon with Abraham and his ambitions. =Discontent among the shepherds.=--Many of Abraham's people, no doubt, were discontented in Babylonia. A shepherd's life is monotonous and hard. When they went to market they saw comforts and luxuries on every hand. Yet the money they received from the wool merchants of Ur gave no promise of larger opportunities in life for any shepherd boy. So, at length when Abraham said to them, "Come, let us leave this country," they were ready to answer, "Lead on, and we will follow!" So it came to pass that Abraham's clan set out northwest, toward Haran, in what is now called Mesopotamia, and finally after some years of migration found themselves camping on the hillsides of Canaan, southeast of the Mediterranean Sea.