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…

With the demise of the Islamic State, a revived al-Qaeda and its affiliates should now be considered the world’s top terrorist threat.

The Trump administration’s approach to ten critical global summits in the year ahead will show whether its pullback from multilateralism in 2017 was an aberration or the start of a new normal.

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…