Introduction -- One. To keep people out -- Two. To keep people in -- Three. To protect crops and livestock -- Four. To defend against the enemy -- Five. To control nature -- Six. To keep two sides apart -- Seven. To protect the city -- Eight. To make money -- Nine. To set boundaries -- Ten. To protect the planet.
Summary:
"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."-- Provided by publisher.
This resource is supported by the Institute of Museum and Library Services under the provisions of the Library Services and Technology Act as administered by State Library of Iowa.