Peter Zeihan is a geopolitical strategist and the founder of the consulting firm Zeihan on Geopolitics. His clients include energy corporations, financial institutions, business associations, agricultural interests, universities, and the U.S. military. He is the author of The Accidental Superpower and The Absent Superpower. He lives in Colorado. Tim Marshall is a leading authority on foreign affairs with more than thirty years of reporting experience. He was diplomatic editor at Sky News and before that worked for the BBC and LBC/IRN radio. He has reported from forty countries and covered conflicts in Croatia, Bosnia, Macedonia, Kosovo, Afghanistan, Iraq, Lebanon, Syria, and Israel. He is the author of Prisoners of Geography: Ten Maps That Explain Everything About the World; The Age of Walls: How Barriers Between Nations Are Changing Our World; and A Flag Worth Dying For: The Power and Politics of National Symbols. He is founder and editor of the current affairs site TheWhatandtheWhy.com. Klaus Dodds is Professor of Geopolitics at Royal Holloway, University of London, and a Fellow of the Academy of Social Sciences. He is a leading authority on geopolitics and is often invited to join panels at events and in the media (including on BBC TV and radio) on the subject of border issues. He has written a number of books for a variety of popular and academic audiences, including for Oxford University Press’ A Very Short Introduction series, and since 2006, he has written a monthly geopolitics column for Geographical Magazine. Daniel Yergin is "America's most influential energy pundit" (New York Times) and "one of the planet's foremost thinkers about energy and its implications" (Fortune). Dr. Yergin is the Pulitzer Prize-winning and bestselling author of The Prize: The Epic Quest for Oil, Money & Power, The Quest: Energy, Security, and the Remaking of the Modern World, and Shattered Peace: The Origins of the Cold War, and coauthor of Commanding Heights: The Battle for the World Economy. He is vice chairman of IHS Markit, one of the world's leading information and research firms.