The name of the event happened when Middle eastern muslins contacted the bantu villages for trade is called: arab slave trades.
Muslims made contact with the Bantu to negotiate slaves, at a time when many countries in Europe, and other countries including the Kingdom of Arabia, used slave labor. The African natives who were adherents of Islam could not be enslaved by the Muslims, as this would go against the principle that free Muslims could not be enslaved.
Cotton since it was taken back to the slavery period and was very useful
That statement is false.
It is true that United States adopt a free market system which allow organisations to fully compete and determine the outcome of supply and demand.
That is being said, Business law and Government regulations are still considered to be an important aspects in businesses because it creates a standard rule for fair competition.