In November 2000, the United Nations General Assembly adopted the United Nations Convention Against Transnational Organized Crime (UNTOC or Convention) and its three protocols on human trafficking, migrant smuggling, and firearms. These instruments are the product of three years of diplomatic negotiations, and they represent a substantial contribution to international lawmaking in the area of transnational criminal law. UNTOC has attracted almost universal participation, with 190 states parties at present. Nearly two decades after the adoption of these instruments, however, remarkably little is known about whether states parties have implemented UNTOC and its protocols in their national legislation, whether they enforce such legislation, and whether they make use of UNTOC's provisions concerning international cooperation (e.g., extradition and mutual legal assistance). In other words, the influence of these instruments in practice remains largely unknown.