What are the pros and cons of slavery?

Pros:

They render free trade; slavery provides free labor to European farms where they get high returns on the farm produce, thus improving the economy.

cons:  It's inhumane; those who buy and sell slaves are violating human rights. People should not be treated as commodities in colonies where they are exploited cruelly.

Explanation:

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

hhebeueubevcje. he. me. e beben