What drives the United States’ bold geopolitical ambitions toward Greenland and Canada? It boils down to economic and national security.

U.S. President Donald Trump this week repeated his assertion that American control of Greenland is vital for “international security.” As Henry Ridgwell reports, Denmark, which owns the island, has admitted failing to invest in its security,

In 1865, in the wake of the Civil War, the U.S. began looking to expand its influence on the world stage. This happened at precisely the moment when Russia, having just lost the Crimean War, was seeking to counterbalance British power in the Pacific. This proved to be the perfect recipe for American expansion in the Arctic.