Puerto Rico’s debt crisis has entered a new stage. Without congressional action and deeper reforms, the island could find itself unable to provide basic services, says CFR expert Brad Setser.

The conflict in Ukraine’s east could remain unresolved indefinitely unless all sides pursue a different course toward a compromise, says expert Nikolas Gvosdev.

As countries prepare to sign the landmark Paris climate accord, the work to reduce global carbon emissions is only beginning, says CFR’s Michael Levi.

Leaked documents have revealed that international tax havens play a larger role than previously understood, and will likely raise pressure for more transparency in global finance, says CFR expert Edw…

The twin bombings in Brussels have exposed the need for closer European security cooperation at the same time that anti-EU political forces are on the rise, says expert Ian Lesser.