Most slaves in Africa were captured in wars or in surprise raids on villages. Adults were bound and gagged and infants were sometimes thrown into sacks.
Answer: Piracy became an important source of slaves for the Roman Empire and in the 5th century AD pirates would raid coastal North African villages and enslave the captured. Chattel slavery persisted after the fall of the Roman Empire in the largely Christian communities of the region.
Technically, when people are attacked by their own government, or when they are denied equal access to education, it is the job of their fellow citizens to protect them, since the citizens should always rise up and demand justice when a government acts tyrannically.
