How did wars in West Africa affect the slave trade?

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Explanation:

As it gained momentum, the abolitionist movement caused increasing friction between states in the North and the slave-owning South. Critics of abolition argued that it contradicted the U.S. Constitution, which left the option of slavery up to individual states.

worldwide, 780 million people do not have access to an improved water source. an estimated 2.5 billion people lack access to improved sanitation (more than 35% of the world's population)