As a child, I thought slavery was ended with the American Civil War. As a teenager I read in The Revelation (or, Apocalypse, in the Bible) about the day when merchants would weep and mourn since no one bought their goods anymore. The list of goods, ends with "and slaves, that is, human souls." So I figured that some day slavery would come back.
Little did I know that it never ended. It is a world-wide business, and today human traffickers' profit $150,000,000,000 every year. It is the second fastest growing "business" after illegal drugs.
Frances Rolleston fought slavery in Great Britain and saw it outlawed. But she soon discovered another kind of slavery—that of greedy factory owners who enslaved entire families, including children. She wrote, "The abolition of African slavery which we have lived to see, and in which many of us joyfully labored heart and hand, encourages us to hope that the scarcely less iniquitous factory slave-trade will yield in time to public reprobation."
One source of information about slavery today is the United Nations Office on Drugs and Crime. Read about it here.