The renewed controversy over the United States and Greenland has unfolded against a backdrop of intensifying global competition in the Arctic, growing strain within Western alliances, and long-standing questions about sovereignty and self-determination. Donald Trump’s repeated suggestions that the United States should annex or otherwise take control of Greenland have moved the issue from a theoretical geopolitical debate into a serious diplomatic flashpoint, particularly because of the language used and the implications it carries for international law and alliance politics.  Mbuyiseni Ndlozi is in conversation with Professor Emeritus of International Law  , Prof Andre Thomashausen.