Canada has long claimed the Northwest Passage as its “internal waters,” while the United States and other countries argue it is an “international strait.” The latter “free sea” position originates in Hugo Grotius, often styled the “father of international law.” However, Grotius later qualifies his own position by granting to coastal states the right to regulate maritime traffic. Grotius's works also inspire the English School of International Relations: an “international society” approach that Canada has historically followed in its overall foreign policy. Hence, a twenty-first-century Grotian vision might suggest a compromise amenable to Canada: Canada would grant passage to conforming American vessels, thus facilitating international trade, but Canada would also gain powers of effective jurisdiction, allowing it to secure and conserve the fragile environment. Canada might thus re-envision sovereignty not as a zero-sum contest for status symbols but as the exercise of functional jurisdiction for the common good of international society.