No animal is so entangled in human history as the horse. The thread starts in prehistory, with a slight, shy animal hunted for food. Domesticating the horse allowed early humans to settle the vast Eurasian steppe; later, their horses enabled new forms of warfare, encouraged long-distance trade routes and acquired cultural and religious significance. Over time, horses came to power empires in Iran, Afghanistan, China, India and Russia.David Chaffetz tells the story of how the horse made rulers, raiders and traders interchangeable, providing a novel explanation for the turbulent history of the "Silk Road", which might be better called the Horse Road. Drawing on recent research in fields including genetics and forensic archaeology, Chaffetz presents a lively history of the great horse empires that shaped civilisation.