Walls

Part of the nonfiction Orca Timeline series, with photographs and illustrations throughout, this book explores why and how people have built walls all over the world throughout the course of human history.|People have built walls to keep others out for thousands of years, from the Great Wall of China to the US-Mexico border wall. But they've also been built to keep people in, to grow food and to control nature. Discover the long history of walls, and why we keep building them today.