Barbed wire is made of two strands of galvanized steel wire twisted together for strength and to hold sharp barbs in place. As creative advertisers sought ways to make an inherently dangerous product attractive to customers concerned about the welfare of their livestock, and as barbed wire became commonplace on battlefields and in concentration camps, the fence accrued a fascinating and troubling range of meanings beyond the material facts of its construction.

In The Perfect Fence, Lyn Ellen Bennett and Scott Abbott explore the multiple uses and meanings of barbed wire, a...