Editor's note: Kevin Bales, a co-founder of Free the Slaves, the American sister organization of the UK's Anti-Slavery International, the world's oldest human rights group, spoke about slavery at the TED2010 conference in February. Bales is the author of "Ending Slavery" and, with Ron Soodalter, "The Slave Next Door: Modern Slavery in the United States." TED, a nonprofit organization devoted to "Ideas Worth Spreading," hosts talks on many subjects and makes them available through its...