The Bush Administration has notoriously argued that detainees at Guantanamo do not enjoy constitutional rights because they are held outside American borders. But where do rules about territorial legal limits such as this one come from? Why does geography make a difference for what legal rules apply? Most people intuitively understand that location affects constitutional rights, but the legal and political basis for territorial jurisdiction is poorly understood. In this novel and accessible treatment of territoriality in American law and foreign policy, Kal Raustiala begins by tracing the history of the subject from its origins in post-revolutionary America to the Indian wars and overseas imperialism of the 19th century. He then takes the reader through the Cold War and the globalization era before closing with a powerful explanation of America's attempt to increase its extraterritorial power in the post-9/11 world. As American power has grown, our understanding of extraterritorial legal rights has expanded too, and Raustiala illuminates why A...