Slavery was part of the foundation upon which Babylonian society rested. But between slavery as it existed in the ancient oriental world and slavery in the Roman or modern world there was a great difference. The slave was often of the same race as his master, sometimes of the same nationality, speaking the same language and professing the same religion. He was regarded as one of the family, and was not infrequently adopted into it. He could become a free citizen and rise to the highest offices of state. Slavery was no bar to his promotion, nor did it imprint any stigma upon him. He was frequently a skilled artisan and even possessed literary knowledge. Between his habits and level of culture and those of his owners was no marked distinction, no prejudices to be overcome on account of his color, no conviction of his inferiority in race. He was brought up with the rest of the family to which he was considered to belong and was in hourly contact with them. Moreover, the large number of slaves had been captives in war. A reverse of fortune might consign their present masters to the same lot; history knew of instances in which master and slave had changed places with one another. There were some slaves, too, who were Babylonians by birth; the law allowed the parent to sell his child, the brother his sister, or the creditor his debtor under certain circumstances, and the old Sumerian legislation ordained that a son who denied his father should be shorn and sold as a slave. In times of famine or necessity a man even sold himself to be quit of a debt or to obtain the means of subsistence. A slave was always fed and clothed; the free laborer at times could get neither food nor clothing. There were three classes of slaves—those who were the property of a private individual, the serfs who were attached to the soil which they cultivated, and the temple slaves who had been dedicated to the service of the gods. Of the second class but few traces are found in Babylonia. Agriculture was carried on there either by free laborers, or by the slaves of the private land-owners. Where the land belonged to priests, it was of course usually the temple slaves who tilled it. What was the exact legal position of the Jews and other exiles who were transported to Babylonia by Nebuchadnezzar we do not know, but they were neither serfs nor slaves. The practice of transportation had been borrowed from Assyria, and under the Assyrian system the exiled population was treated as a colony. Israelites appear among the Assyrian officials in contracts of the second Assyrian empire, and Jewish names are found in the Babylonian contracts of the age of Nebuchadnezzar and his successors.