After World War II, nations pledged to create a more equal and law-abiding world. Now Russia, China and the U.S. are ...

Mr. Trump is tapping into this social and intellectual history, promising to “pursue our Manifest Destiny into the stars” — ...

Indeed, the age of empires may have ended with World War II, as world powers have moved on from colonization and conquest in favor of geopolitical and commerical influence.

The ancient Greek ideal of World Unity is manifested in the conquests of Alexander the Great aiming to unite the world through Hellenization.