"The Age of Walls" examines the emergence of international barriers and how they have affected international politics, economy, and culture. Tim Marshall investigates the historical, social, and geopolitical causes behind the spread of walls and fences throughout the world, from the Israeli-Palestinian barrier to the US-Mexico border. He contends that these actual and symbolic barriers are altering our planet and posing serious obstacles to global collaboration and understanding. The book offers a stimulating examination of the intricate forces underlying the age of walls and their implications for our shared future.