Since 1945, Pax Americana has promised peaceful international relations and an open economy, buttressed by U.S. military power. But in championing "America First," President Trump has advocated selective U.S. engagement, in which foreign commitments are limited to areas of vital U.S. interest and economic nationalism is the order of the day. Allies and challengers alike are paying close attention. Ambassador Daalder and Dr. Lindsay have co-authored the book, The Empty Throne: America's Abdication of Global Leadership, released October 16, 2018. The book discusses the apparent disruption to the world order that the United States fashioned from the ruins of WWII and that produced unprecedented global stability, prosperity and democratic consensus. Critics argue that Donald Trump's America First Policy threatens this world order, yet, the authors maintain, this order has been fraying for years. Photo credit: [Joyce N. Boghosian/The White House](https://www.whitehouse.gov/briefings-statements/photos-of-the-week-033018/ "")