Turkish President Recep Tayyip Erdogan during a rally of his supporters after the country’s abortive July 15 coup, Istanbul, Aug. 7, 2016 (Presidential Press Service photo by Kayhan Ozer via AP).

Editor’s note: This article is part of an ongoing WPR series inviting authors to identify the biggest priority—whether a threat, risk, opportunity or challenge—facing the international order and U.S. foreign policy today. Just 25 years after winning the Cold War, with the collapse of the Soviet Union and the communist regimes of Eastern Europe, the United States is facing a very different world than the one many had expected. Instead of a world of relative peace, with no proxy wars in developing countries and no major global geostrategic opponents, there is violence and terrorism around the globe, much of it […]

A Belgian soldier patrols on a main boulevard in Brussels, Nov. 22, 2015 (AP photo by Geert Vanden Wijngaert).

Editor’s note: This article is part of an ongoing WPR series inviting authors to identify the biggest priority—whether a threat, risk, opportunity or challenge—facing the international order and U.S. foreign policy today. For the prosperous and stable nations of Europe and North America, the cost of terrorism is usually dwarfed by the cost of reactions to it. Avoiding such overreaction is the most pressing challenge in security policy today. The number of Westerners killed by terrorists has grown of late, thanks largely to attacks in Brussels, Paris, Istanbul and Nice related to the self-described Islamic State. Still, the threat remains […]