The Date of Ādi Śaṅkarācārya and Emergence of Śaivism as a Popular Religion in South India

The date of Ādi Śaṅkarācārya has been one of the unsolved problems of Indian Philosophy. He is generally accepted to have lived from 788 to 820 CE and is thus assigned from the end of the eighth century to the beginning of the ninth century. So far scholars who have worked on this problem have consulted his hagiographies and his works to determine his date. However, they have not studied the date of Ādi Śaṅkarācārya by placing him in the context of the development of religion in South India. Nor have they consulted South Indian sources, especially Tamiḻ texts, to see if there are any references to his philosophy. In this paper, I study the problem of the date of Ādi Śaṅkarācārya by consulting Tamiḻ sources and the hitherto less consulted epic Śivarahasya. I also connect his date with the emergence of Śaivism as a popular religion in South India. Based on my study, I place Ādi Śaṅkarācārya in the fifth century BCE and as a result, I emphasize the importance of redating Hindu scriptures, especially the Vedas, as Ādi Śaṅkarācārya is the earliest commentator.