A U.S. history professor at the University of the District of Columbia explains America’s long record of territorial expansion amid renewed discussion of Donald Trump’s interest in Greenland.

Global political history is punctuated by state entities that, after vanishing from the international stage, have reemerged in new forms—sometimes radically transformed, sometimes strikingly faithful ...

It's been 237 years since delegates from around the then-fledgling United States came together in Philadelphia to hammer out what would become the country's founding document, but how its principals ...