referring to the clans of the goddesses and their Shakti tantras, which may have been established around the 9th century. It includes sexual rituals, sanguinary practices, the ritual consumption of liquor and the importance of spirit possession. It includes various sub-traditions the developed in different regions of India, such as the Trika lineage (which worships a trio of deities: Parā, Parāparā, and Aparā), the tradition of the fierce goddess Guhyakālī, Krama tradition, focusing on the goddess Kālī, the Kubjikā cult, and the southern tradition which worships the beautiful goddess Kāmeśvarī or Tripurasundarī. During the 10th century, the syncretic Nondual School of Kashmir Śaivism developed. According to Alexis Sanderson, this tradition arose out of the confrontation between the dualistic and more orthodox Śaiva Siddhānta and the nondual transgressive traditions of the Trika and Krama. According to David B. Gray, this school integrated elements from both of these traditions, "the end result was a nondualistic system in which the transgressive elements were internalized and hence rendered less offensive to the orthodox." The philosophers of Kashmir Śaivism, especially Abhinavagupta (c. 975–1025 ce) and his student Jayaratha, are some of the most influential philosophers who wrote on Hindu tantra. These thinkers synthesized the various goddess and Śaiva lineages and philosophies into a comprehensive and influential religious system. According to David White, Abhinavagupta "sublimates, cosmeticizes, and semanticizes many of its practices into a type of meditative asceticism whose aim is to realize a transcendent subjectivity". Thus, his work domesticated the radically antinomian practices of Vidyāpīṭha lineages into meditative exercises. The last major Śaiva tantric tradition is that of the Nāth or "Split-Ear" Kānphaṭa tradition, which emerged in the 12th or 13th century. They produced various Haṭhayoga texts which draw on tantric yogas. While the Śākta traditions continued to develop in different ways, sometimes in a more popular and devotional direction, many of them retain various tantric elements today. The two most important and popular Śākta tantra traditions today are the Southern Kaula transmission, which focus on the beautiful goddess Śrī (śrīkula) or Lalitā Tripurasundarī and the Northern and Eastern transmission, focusing on the ferocious goddess Kālī (kālīkula). The southern transmission gave rise to the Śrī Vidyā tradition, an important tantric religion in South India. Though it takes much of its philosophical and doctrinal system from Kashmir Shaivism, it generally avoids the transgressive elements and is orthodox or "right handed". Bhaskararaya (18th century) is considered a