As the world rapidly grows more urban, city leaders are turning to a new form of voluntary, locally oriented diplomacy to coordinate with their global peers on sustainable development, infrastructure…

The latest recurrence of domestic protests in Iran stems from the country’s role in regional wars, combined with corruption and economic mismanagement. This discontent is likely to continue to pose a…

With the Castro era coming to a close in Cuba, it may be time for President Donald J. Trump to take back some of his predecessor’s concessions to Havana.

South Korea must capitalize on its diplomatic push to bridge the divide between its longtime ally and its combative neighbor.

The president’s first national security strategy eloquently sums up the U.S. role in the world and what should be done to defend it, but much of the document is at odds with what the president himsel…