The Algerians wanted equality since they were helping to fight for the French
Many people favored a policy of Isolationism
It was extremely cheap to buy slaves and maintain them. It was also beneficial to slave owners because they could sell slaves for more money than they got them for. On top of this slave owners automatically owned any children their slaves had while under their ownership.
Europeans sent sailors and explorers to east Asia because they needed trade routes and sugar, spices, and colonies. They also forced people in the land they explored to become slaves.<span />