Key LegislationModern prohibitions of human trafficking in the United States have their roots in the 13th Amendment to the U.S. Constitution, which barred slavery and involuntary servitude in 1865. Prior to 2000, the Department of Justice (DOJ) filed human trafficking cases under several federal statutes related to involuntary servitude and slavery, but the criminal laws were narrow and patchwork. In the last two decades, Congress has passed a number of comprehensive bills designed to bring the full power and attention of the federal government to the fight against human trafficking. Here are brief summaries of some of the most significant legislation in this area.