Laws were needed to justify the need for order in the rising complexity of the civilization so as more laws were written more were enforced and more were needed to justify that enforcement
" Non-Muslims could often retain their own religions. They were required to pay a special tax, called a jizya, a source of income for the state. Many of those who did convert were not immediately accepted into the community. "
Source : khan academy
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<span>The Persian Empire controlled the largest amount of territory in Mesopotamia. </span><span />