Kevin Bales, a leader in the abolition movement to end modern-day slavery and co-author of The Slave Next Door: Human Trafficking and Slavery in America Today. Bales estimates some 27 million people labor as slaves today - more than at anytime in history. Bales has also helped expose modern-day slavery in the United States, where he estimates between 14,000 and 17,500 people are trafficked into the country each year. He writes, "There has never been a single day in our America, from its discovery and birth right up to the moment you are reading this sentence, without slavery."