Nearly 30 million people around the world are living as slaves, according to a new index ranking 162 countries. The index was compiled by Australian-based rights organization Walk Free Foundation using a definition of modern slavery that includes debt bondage, forced marriage and human trafficking.

http://www.globalslaveryindex.org/
http://www.walkfree.org/
US trafficking report reveals ‘modern slavery’ toll
New global index exposes ‘modern slavery’ worldwide