Who actually controls the Northwest Passage? Who owns the trillions of dollars of oil and gas beneath the Arctic Ocean? Which territorial claims will prevail, and why those of the United States, Russia, Canada, or the Nordic nations? And, in an age of rapid climate change, how do we protect the fragile Arctic environment while seizing the economic opportunities presented by the rapidly melting sea-ice? Michael Byers, a leading Arctic expert and international lawyer clearly and concisely explains the sometimes contradictory rules governing the division and protection of the Arctic and the disputes over the region that still need to be resolved. What emerges is a vision for the Arctic in which cooperation, not conflict, prevails and where the sovereignty of individual nations is exercised for the benefit of all. This insightful little book is an informed primer for today's most pressing territorial issue.