Slavery - Causes Slavery was caused by economic factors of the english settlers in the late 17th century. Colonists continually tried to allure laborers to the colony. The headright system was to give the indentured servant, a method of becoming independent after a number of years of service. Slavery was caused by economic reasons. Colonists chiefly relied on Indentured Servitude, inorder to facilitate their need for labor. The decreasing population combined with a need for a labor force, led colonists to believe that African slaves were the most efficient way to acquire a labor force that would satisfy their needs. Before the 1680's, I