Devil's Rope.

The history of barbed wire, whose use dates back to the first settlers of the Wild West, always driven by their reckless and ruthless spirit of conquest and selfish ambition to leave their mark on wild lands; of its relationship with politics and mercantilism; of the perversion of the millenary relationship between men and animals; of the evolution of surveillance techniques. Fences and borders: the tragic tale of the enclosure of the world.