A revolutionary new history of the diffusion of Indian ideas, from the award-winning, bestselling author and co-host of the chart-topping Empire podcast India is the forgotten heart of the ancient world. In the millennium and a half from c. 250 BC to 1200 AD, Indian art, religion, technology, astronomy, music, dance, literature, mathematics and mythology blazed a trail across the world - a Golden Road that stretched from the Red Sea to the Pacific. Here, William Dalrymple draws from a lifetime of scholarship to highlight India's oft-forgotten position as the heart of ancient Eurasia. For the first time, he gives a name to this spread of Indian ideas that transformed the culture and technology of not only its ancient world, but of the world as we know it today.