India has inspired William Dalrymple for well-on thirty years, resulting in a number of eminently readable books, including White Mughals—an analysis of east-west inter-cultural conflicts), Return of a King (a portrait of military disaster); and The Anarchy, an exposé of colonial exploitation. In his latest book, The Golden Road, Dalrymple for the first time tackles a big, civilizational theme: what world history owes to the subcontinent.

After reading David Chaffetz’s newest book, you’d think that the horse—not oil—has been humanity’s most important strategic commodity. As David writes in his book Raiders, Rulers and Traders: The Horse and the Rise of Empires, societies in Central Asia grew powerful on the backs of strong herds of horses, giving them a military and an economic advantage against their horse-less neighbors. Persia, India and China all burned cash trying to sustain their own herds of horses–-with little success.

No animal has had as profound an impact on human history as the horse. The journey begins in prehistory, with a small, shy animal that humans hunted for food. Hunters domesticated the horse in order to ensure a supply of meat and, later, mare’s milk, which is more nutritious than cow’s milk. This was a watershed event for both species, transforming the horse from an animal fleeing at a gallop from the mere smell of humans into the most valuable of their livestock. The horse’s need to roam far and wide for pasture prompted the horse herders to spread out across the Eurasian steppe. Then herders learned to ride horses in order to keep up with their far-flung herds; this changed the course of history.

Since around the turn of the new millennium, an explosion of science, archaeology and historical research have come together to establish the centrality of the steppe in world history: the place whence hail both Indo-Europeans and the wheel, a region that spawned empire after empire, from the Xiongnu to the Mongols. That “the region lying between east and west … was the axis on which the globe spun” (as Peter Frankopan put it in The Silk Roads: A New History of the World a decade ago) no longer seems a contentious statement.