The Vedic-Puranic literature as well as archaeological, geological, historical, linguistic, and literary accounts have been reviewed to establish the various cultures that evolved in ancient India from about 3500 BCE to the Mahabharata War (1450 BCE). The book describes various misconceptions, e.g., the myth about an Aryan invasion. The following markers are used to establish the dates and geographical locations of various cultures: (i) The rise in sea levels due to melting of land-based snow after the last Ice Age. (ii) Migration of the Dravidian people from the lost continent of Kumari Kandam that submerged under the Indian Ocean. (iii) The dates for the start of farming, use of kiln-baked bricks, domestication of horses, and metal working in the Indian subcontinent. (iv) The dates when Sarasvati River dried up and the Mahabharata War occurred. The book notes that asva-containing or rath-containing names could not have existed before horses were domesticated or chariots were in use. The book also notes that Mathura Krsna is different from Dwarka Krsna; the two are separated by more then 1000 years. During Mathura Krsna’s time, conflicts were settled by hand-to-hand combat or with the use of a mace. In contrast, during Dwarka Krsna’s time, metal arms were used.

A spiritual history of the world's most religiously complex and diverse society, from one of Harvard's most respected scholars. India: A Sacred Geography is the culmination of more than a decade's work from the renowned Harvard scholar Diana L. Eck. The book explores the sacred places of India, taking the reader on an extraordinary trip through the beliefs and history of this rich and profound place, as well as providing a basic introduction to Hindu religious ideas and how those ideas influence our understanding of the modern sense of "India" as a nation.