Transnational crime is a business, and business is very good. Money is the primary motivation for these illegal activities. The revenues generated from the 11 crimes covered in this report—estimated to range between US$1.6 trillion and $2.2 trillion per year—not only line the pockets of the perpetrators but also finance violence, corruption, and other abuses. These crimes undermine local and national economies, destroy the environment, and jeopardize the health and wellbeing of the public. Transnational crime will continue to grow until the paradigm of high profits and low risks is challenged. This report calls on governments, experts, the private sector, and civil society groups to seek to address the global shadow financial system by promoting greater financial transparency.