Barbed wire

"In this original book, historian and philosopher Reviel Netz explores the development of a controlling and pain-inducing technology - barbed wire. Surveying its development from 1874 to 1954, Netz describes its use to control cattle during the colonization of the American West and to control people in Nazi concentration camps and the Russian Gulag. Physical control over space was no longer symbolic after 1874"--Jacket.