Tim Marshall, the New York Times bestselling author of Prisoners of Geography, offers “a readable primer to many of the biggest problems facing the world” (Daily Express, UK) by examining the borders, walls, and boundaries that divide countries and their populations.

The globe has always been a world of walls, from the Great Wall of China to Hadrian’s Wall to the Berlin Wall. But a new age of isolationism and economic nationalism is upon us, visible in Trump’s obsession with building a wall on the Mexico border, in Britain’s Brexit vote, and in many other places as well. China has the great Firewall, holding back Western culture. Europe’s countries are walling themselves against immigrants, terrorism, and currency issues. South Africa has heavily gated communities, and massive walls or fences separate people in the Middle East, Korea, Sudan, India, and other places around the world.

In fact, more than a third of the world’s nation-states have barriers along their borders. Understanding what is behind these divisions is essential to understanding much of what’s going on in the world today. Written in Tim Marshall’s brisk, inimitable style, The Age of Walls is divided by geographic region. He provides an engaging context that is often missing from political discussion and draws on his real life experiences as a reporter from hotspots around the globe. He examines how walls, borders, and barriers have been shaping our political landscape for hundreds of years, and especially since 2001, and how they figure in the diplomatic relations and geo-political events of today.

“Marshall is a skilled explainer of the world as it is, and geography buffs will be pleased by his latest” (Kirkus Reviews). “Accomplished, well researched, and pacey…The Age of Walls is for anyone who wants to look beyond the headlines and explore the context of some of the biggest challenges facing the world today, it is a fascinating and fast read” (City AM, UK).

Tim Marshall is a leading authority on foreign affairs with more than 30 years of reporting experience. He was diplomatic editor at Sky News, and before that was working for the BBC and LBC/IRN radio. He has reported from 40 countries and covered conflicts in Croatia, Bosnia, Macedonia, Kosovo, Afghanistan, Iraq, Lebanon, Syria and Israel. He is the author of the Sunday Times bestsellers Prisoners of Geography: Ten Maps that Tell You Everything You Need to Know About Global Politics and Divided: Why We’re Living in an Age of Walls; Worth Dying For: The Power and Politics of Flags; and Shadowplay: Behind the Lines and Under Fire. He is founder and editor of the current affairs site TheWhatandtheWhy.com.