What can bring about peace in an era of geopolitical rivalry and persistent conflict? In an ambitious new report, the International Crisis Group takes a hard-nosed approach to this question, offering a realistic assessment of what is—and is not—possible when it comes to preventing and ending conflict today.

I caught up with Crisis Group's Comfort Ero, Michael Hanna, and Ginger Jacobs at the Aspen Security Forum in July. They explain why a new approach to conflict resolution is needed—and why the old models are no longer suited to today's world.