Displacement from climate change is an increasingly critical issue, but requires improved study and new policy responses.

How can the U.S. build a sustainable and cost-effective counterterrorism operational concept?  

A conversation with journalist Arzu Geybulla.

When does customary international law permit an adversary to attack the U.S. in a neutral defense partner's territory?

Surveying the wide array of groups and ideologies that have emerged over the last few years.

There are no plausible benign explanations for Trump’s conduct here. Even three days before the election, people should care.

The world should treat such power grabs like a coup d’état.

A more transactional policy has brought advantages, but will have limits in the longer term.

Three lawsuits in U.S. federal court represent an inflection point in the global effort to hold Libyan war criminals legally accountable for torture and extrajudicial killings.

We filed a lawsuit to force President Trump to comply with his war powers reporting obligations under the law—and we won.

The Trump administration has recently taken a series of actions aimed at addressing vulnerabilities in supply chains for critical minerals—materials that are scarce and yet crucial for economic and natio...