Compendium of All Philosophies (Sarvadarśanasaṃgraha)

A Sanskrit survey of the philosophical systems known in fourteenth-century India, attributed to Mādhava, usually identified with Vidyāraṇya of the Śṛṅgeri monastery, although the attribution is disputed. Each chapter presents one system in the words of its own defenders before the next system answers it. The order rises from the views the author considers furthest from the truth to those nearest it. It begins with the Cārvāka materialists, whose denial of inference, the soul and an afterlife is preserved here more fully than almost anywhere else, then the Buddhists and the Jains. It moves through the Vaiṣṇava theologies of Rāmānuja and Madhva, several Śaiva schools including the Pratyabhijñā, an alchemical school, Vaiśeṣika, Nyāya, Mīmāṃsā, the grammarians, Sāṃkhya and Yoga. The work ends at the threshold of Śaṅkara's Advaita Vedānta, which it says has been treated elsewhere and which the whole series is meant to point towards.

It is the best traditional overview of the Indian schools in one book, and one of the main surviving sources for Cārvāka materialism.