Is Donald Trump a Viking Warlord?

During his first term, President Donald Trump floated the idea of the U.S. buying Greenland from Denmark. Media coverage focused on the Danes’ outraged response without clarifying how Greenland’s dependence on Denmark came to be and whether it’s in Greenlanders’ best interests. With the advent of Trump’s second term, the possibility of a Greenland purchase—or really, any kind of deal—is back, too. American interest in Greenland is not superficial, but a sign of a return to strategic realism, argues Liz Buchanan, author of the new book So You Want to Own Greenland?: Lessons from the Vikings to Trump.