The era of scientific cooperation that birthed the Antarctic Treaty, when contrasted with the global threat posed by climate change, attests to the need for a new, planetary politics.

Incipient cyber norms will not become established principles of conduct overnight. 

Achieving strategic autonomy will require Europeans to develop a coherent strategic culture, reach agreement on  priorities, and reassure U.S. leaders that greater autonomy is complementary to NATO. …

European leaders are championing multilateral cooperation as the United States continues its turn away from global leadership.

The U.S. abdications of the Covenant of the League of Nations and the Paris Climate Accords may be remembered as bookends to the American century.

Proponents of restraint need to clarify what the term means, how to implement it, and its implications for U.S. national interests and world order.   

Elizabeth Warren and Bernie Sanders are both progressives, but their foreign policy visions diverge in important ways.

A "Right to Assist" could help prevent violent conflict and ease democratic transitions. But several important questions remain unanswered. 

Each week between now and the Iowa caucuses, I’m talking with two experts with differing views on how the United States should handle a foreign policy challenge it faces. These special episodes are p…

Questions of legitimacy have long plagued the G7. The Trump administration's announcement of the Trump National Doral resort as the venue for next year's summit marks a new low.