The book discusses four prehistoric migrations in India. The book posits that the Harappans were a mixture of Zagros agriculturists and First Indians, a wave of migrants who came from Africa into Arabia and then reached India around 65,000 years ago. Citing recent DNA evidence, the book traces the subsequent large migrations of anatomically modern humans into India—of agriculturalists from Iran between 7000 and 3000 BCE and Indo-European languages speaking pastoralists from the Central Asian Steppe between 2000 and 1000 BCE, among others. Joseph uses the layers of a pizza as a metaphor to explain the make-up of subcontinental society. The book also discusses about similarities and differences between Indus Valley civilization and early Vedic civilization. The book mentions that "Aryan" culture was most likely the result of interaction, adoption and adaptation among those who brought Indo-European languages to India and those who were already well-settled inhabitants of the region, and that Sanskrit and the Vedas developed in the Indian subcontinent. Various tribes like the Andamanese and the Semang, the Mani and the Aeta people were the earliest inhabitants of Southeast Asia. According to Joseph, Proto-Dravidian is related to the Elamitic language of Iran. The caste system in India is a recent social system, reflected in sharply reduced inter-marriage and genetic mixing after 100 AD. This book also takes into account the path-breaking DNA research and findings from geneticist David Reich's research.
Reception
The book was well received by readers and many critics. Sujatha Byravan wrote in The Hindu that the book tells a compelling story of our forefathers based on genetic evidence. Razib Khan of India Today said that the book presents a clear understanding of Early Indians. Swaminathan Aiyar of The Times of India thought that the book helps us understand how all Indians have African, Harappan and Steppe Asian genes in different doses. Author Gurcharan Das said that the book helps us understand that Indians are composed of a large number of small populations. Kesavan Veluthat of The Hindu stated that the book shows a firm basis on which the study of Indian history can begin. This is of especial importance in the context of the post-truth conditions of the present, when myth-making seeks to replace authentic knowledge.
Awards
Best non-fiction books of the decade - The Hindu
Book of the Year Award, Tata Literature Live, 2019 - The Wire