Shuddadvaita (Sanskrit: śuddhādvaita "pure non-dualism") is the "purely non-dual" philosophy propounded by Vallabhacharya (1479-1531 CE), the founding philosopher and guru of the Vallabhā sampradāya ("tradition of Vallabh") or Puśtimārg ("The path of grace"), a Hindu Vaishnava tradition focused on the worship of Krishna. Vallabhacharya's pure form (nondualist) philosophy is different from Advaita. The Shrinathji temple at Nathdwara, and compositions of eight poets (aṣṭachap), including Surdas, are central to the worship by the followers of the sect.
Though the tradition originated near Vrindavana in the current Indian state of Uttar Pradesh, in modern times followers of Shuddadvaita are concentrated in the states of Rajasthan and Gujarat.
In the ancient Vedic tradition of knowledge and comprehension of reality, the central theme would be experiencing the Supreme Entity or Brahman. Vedas primarily contain references to the adwait nature of Brahm. However, depending on how a scholar perceives those verses, s/he might see duality— dwait aspect as well. This ambiguity has led to several philosophical traditions in the Indian history, such as: