This publication provides a comprehensive summary of the core international law against slavery, its origins, and progress made via the international campaign to abolish slave trade and slavery. Various issues are explored in detail, including the legal instruments and institutions that have been established to combat slavery (including the United Nations Working Group on Contemporary Forms of Slavery); evolving definitions of slavery, contemporary forms of slavery and other related practices. The publication also delves into forced labour, debt bondage, migrant workers, trafficking in persons, prostitution, forced marriage, the sale of wives and international monitoring mechanisms.