Why did white southerners believe that a separate code of laws applying only to “persons of color was necessary

The white Southerns believed that a separate code of laws applying to black people was necessary because they wanted to restrict freedom of African Americans. They wanted to control the freedom of former slaves and their decendents.

Southerns believed that creating a separate code would help mantain peace but it only brought more problems and justified generalized anger.  

the great wall of china worked as a defense for the feudal states of the zhou dynasty to the north. during the warring states period more walls were put up to defend the borders of the different kingdoms. it was semi successful because despite the wall, the mongols eventually conquered china also the great wall provided protection to the economic development and cultural progress, safeguarded the trading routes such as the silk road, and secured transmission of information and transportation. @jayxboof

the virginia plan called for three branches of government and two houses of congress. representation in each house would be determined by population. the new jersey plan called for three branches of government and a single house of congress. each state would have an equal vote.