A surprising number of maritime boundaries remain unresolved, and a range of reasons can be cited to explain why the process of delimiting these boundaries has been so slow. This volume addresses and analyzes some of these reasons, focusing on some of the volatile disputes in Northeast Asia and in North America. Scholars from Asia, the United States, and Europe grapple with festering controversies and apply insights gained from resolved disputes to those that remain unresolved. Islands continue to haunt this process, and the way in which they should affect maritime boundaries remains in dispute. The United States has a number of disputed boundaries with its neighbors to the north and south, and these are examined. Antarctica is a concern of all nations, and the regimes governing the Southern Ocean surrounding Antarctica are analyzed. The International Tribunal for the Law of the Sea was created to allow countries to resolve their disputes peacefully, and two chapters look at how this new court is operating. The impact of sea-level rise on maritime boundaries is given special attention in the opening chapter. This volume presents a wonderful collection of provocative chapters written by the top scholars in the field of International Ocean Law. It should help scholars, students, and decision makers to understand the current state of this field and to move some of the difficult disputes toward resolution.