Puerto Rico, one of the last and most populated colonial territories in the world, occupies a relatively unique position. Its lengthy interaction with the United States has resulted in the long-term acquisition of expanded legal rights and relative political stability. At the same time, that interaction has simultaneously seen political intolerance and the denial of basic rights, particularly toward those who have challenged colonialism. In Puerto Rico under Colonial Rule, academics and intellectuals from the fields of political science, history, sociology, and law examine three themes: evidence of state-sponsored political persecution in the twentieth century, contemporary issues, and the case of Vieques.