Materialism is considered to be an anathema to Indian philosophy. Despite this, Indian tradition boasts of a strong materialist trend predating the Vedas. This paper traces the proto-materialist ideas as found in the ancient Tantra and pre-classical or original Sāṃkhya. Representing the naturalistic trend in Indian philosophy, ancient Tantra identified the brain as the seat of human consciousness. The pre-classical Sāṃkhya considered matter as the primal non-intelligent or non-sentient first cause from which the universe was to evolve. It considers the (...) material cause to be self-sufficient for the purpose of producing the world; the principle of consciousness is potentially contained in the primeval matter. This paper aims to provide an overview of the Indian materialist viewpoint for multidisciplinary scholars. (shrink)