The answer is: They were free because they obeyed their masters.
According to James Henley Thornwell, the 'Masters' of the slaves were placed on the earth to provide 'guidances for the slaves. He made the justification that since the Masters received responsibility from God to educate the slaves, the slaves technically free from the God's judgement.
<span>Citizens would have broken laws without
knowing it</span>
When the laws are not written down,
then the citizens are unlikely to be informed. The resulting ignorance will
result in actions that contravene the laws yet the citizens will not be aware.
I believe it is the <span>Federalists. </span>
Yes, in general it is true that trade led to many changes in Sumerian society, since once the Sumerians started trading they were able to increase profits and obtain raw materials that were used to increase quality of life.