This book analyzes and discusses the sovereignty of the Nansha Islands, combining legal and historical perspectives, traditional international law theories, and empirical studies based on an extensive body of historical maps from around the globe to do so. Ultimately, the book argues that China has sovereignty over the Nansha Islands and the surrounding waters, either on the basis of historical claims or modern realities. In recent years, the Nansha disputes have attracted considerable attention. Far from being resolved, they have instead become even more heated. The only reasonable way to solve the problem, as argued here, is on the basis of relevant history and legislation. Addressing this highly topical issue, the book also provides an English-speaking audience with access to essential content on the sovereignty, history, and legislation concerning the Nansha Islands.