Hindu Deities Desktop Statue

In Hinduism, forms of explicit monotheism have developed in the medieval Bhakti movement. These derive from the philosophical system of Advaita or non-dualism developed by Adi Shankara in the 9th century, within the framework of the Vedanta school of classical Hindu philosophy.

Shankara's non-dualism postulated the identity of the Self or Atman with the Whole or Brahman, and as such can be better described as monism or pantheism than as monotheism. The shift to explicit monotheism is initated by the South Indian Alvars with their emotional or ecstatic devotion (bhakti) to Vishnu-Krishna. This form of monotheism, also known as Krishnaism, became immensely popular in medieval India, spreading to North India by the 15th century.