Elliot Ackerman is the author of the novels Halcyon, Red Dress in Black and White, Waiting for Eden, Dark at the Crossing, and Green on Blue, and the memoirs The Fifth Act and Places and Names. His books have been nominated for the National Book Award and the Dayton Literary Peace Prize. He is both a former White House Fellow and Marine, and served five tours of duty in Iraq and Afghanistan, where he received the Silver Star, the Bronze Star for Valor, and the Purple Heart. He is currently a contributing writer at The Atlantic.

Admiral James Stavridis, USN (Ret.), spent more than thirty years in the US Navy, rising to the rank of four-star admiral. He was Supreme Allied Commander at NATO and previously commanded US Southern Command, overseeing military operations through Latin America. At sea, he commanded a Navy destroyer, a destroyer squadron, and an aircraft carrier battle group in combat. He holds a PhD from the Fletcher School of Law and Diplomacy at Tufts University, where he recently served five years as dean. He received fifty medals in the course of his military career, including twenty-eight from foreign nations. He has pub­lished twelve other books and is chief international analyst for NBC News and a Bloomberg Opinion weekly columnist. He is currently partner and vice chair, global affairs of the Carlyle Group and the chair of the board of the Rockefeller Foundation.