Starting in the early centuries of common era, newly revealed Tantras centering on Vishnu, Shiva or Shakti emerged. In Buddhism, the Vajrayana tradition is known for its extensive tantra ideas and practices. Tantric Hindu and Buddhist traditions have influenced other Eastern religious traditions such as Jainism, the Tibetan Bön tradition, Daoism and the Japanese Shintō tradition.
Certain modes of non-vedic worship such as Puja are considered tantric in their conception and rituals. Hindu temple building also generally conforms to the iconography of tantra. The Hindu texts that describe these topics are called Tantras, Āgamas or Samhitās. In Buddhism, its tantra-genre literature has influenced the artworks in Tibet, historic cave temples of India and imagery in Southeast Asia.
The connotation of the word tantra to mean an esoteric practice or religious ritualism is a colonial era European invention. The term is based on the metaphor of weaving, states Ron Barrett, where the Sanskrit root tan means the warping of threads on a loom. It implies "interweaving of traditions and teachings as threads" into a text, technique or practice.
The word appears in the hymns of the Rigveda such as in 10.71, with the meaning of "warp (weaving)". It is found in many other Vedic era texts, such as in section 10.7.42 of the Atharvaveda and many Brahmanas. In these and post-Vedic texts, the contextual meaning of Tantra is that which is "principal or essential part, main point, model, framework, feature". In the Smritis and epics of Hinduism (and Jainism), the term means "doctrine, rule, theory, method, technique or chapter" and the word appears both as a separate word and as a common suffix, such as atma-tantra meaning "doctrine or theory of Atman (soul, self)".
The term "Tantra" after about 500 BC, in Buddhism, Hinduism and Jainism is a bibliographic category, just like the word Sutra (which means "sewing together", mirroring the metaphor of "weaving together" in Tantra). The same Buddhist texts are sometimes referred to as tantra or sutra; for example, Vairocabhisambodhi-tantra is also referred to as Vairocabhisambodhi-sutra. The various contextual meanings of the word Tantra vary with the Indian text and are summarized in the appended table.
The 5th-century BC scholar Pāṇini in his Sutra 1.4.54–55 of Sanskrit grammar, cryptically explains tantra through the example of "Sva-tantra" (Sanskrit: स्वतन्त्र), which he states means "independent" or a person who is his own "warp, cloth, weaver, promoter, karta (actor)". Patanjali in his Mahābhāṣya quotes and accepts Panini's definition, then discusses or mentions it at a greater length, in 18 instances, stating that its metaphorical definition of "warp (weaving), extended cloth" is relevant to many contexts. The word tantra, states Patanjali, means "principal, main".
He uses the same example of svatantra as a composite word of "sva" (self) and tantra, then stating "svatantra" means "one who is self-dependent, one who is his own master, the principal thing for whom is himself", thereby interpreting the definition of tantra. Patanjali also offers a semantic definition of Tantra, stating that it is structural rules, standard procedures, centralized guide or knowledge in any field that applies to many elements.
The ancient Mimamsa school of Hinduism uses the term tantra extensively, and its scholars offer various definitions. For example:
When an action or a thing, once complete, becomes beneficial in several matters to one person, or to many people, that is known as Tantra. For example, a lamp placed amidst many priests. In contrast, that which benefits by its repetition is called Āvāpa, such as massaging with oil. (...)
Medieval texts present their own definitions of Tantra. Kāmikā-tantra, for example, gives the following explanation of the term tantra:
Because it elaborates (tan) copious and profound matters, especially relating to the principles of reality (tattva) and sacred mantras, and because it provides liberation (tra), it is called a tantra.
The occultist and businessman Pierre Bernard (1875–1955) is widely credited with introducing the philosophy and practices of tantra to the American people, at the same time creating a misleading impression of its connection to sex.
In modern scholarship, Tantra has been studied as an esoteric practice and ritualistic religion, sometimes referred to as Tantrism. There is a wide gap between what Tantra means to its followers, and what Tantra has been represented or perceived as since colonial era writers began commenting on Tantra. Many definitions of Tantra have been proposed since, and there is no universally accepted definition. André Padoux, in his review of Tantra definitions offers two, then rejects both. One definition, due to Padoux, is found among Tantra practitioners — it is any "system of observances" about the vision of man and the cosmos where correspondences between the inner world of the person and the macrocosmic reality play an essential role. Another definition, more common among observers and non-practitioners, is some "set of mechanistic rituals, omitting entirely the ideological side".
Tantric traditions have been studied mostly from textual and historical perspectives. Anthropological work on living Tantric tradition is scarce, and ethnography has rarely engaged with the study of Tantra. This is arguably a result of the modern construction of Tantrism as occult, esoteric and secret. Some scholars have tried to demystify the myth of secrecy in contemporary Tantric traditions, suggesting new methodological avenues to overcome the ethical and epistemological problems in the study of living Tantric traditions.
According to David N. Lorenzen, two different kinds of definitions of Tantra exist, narrow and broad. According to the narrow definition, Tantrism, or "Tantric religion", is the elite traditions directly based on the Sanskrit texts called the Tantras, Samhitas, and Agamas. Lorenzen's "broad definition" extends this by including a broad range of "magical beliefs and practices" such as Yoga and Shaktism.
Richard Payne states that Tantra has been commonly but incorrectly associated with sex, given popular culture's prurient obsession with intimacy. Tantra has been labelled as the "yoga of ecstasy", driven by senseless ritualistic libertinism. This is far from the diverse and complex understanding of what Tantra means to those Buddhists, Hindu and Jains who practice it.
David Gray disagrees with broad generalizations and states that defining Tantra is a difficult task because "Tantra traditions are manifold, spanning several religious traditions and cultural worlds. As a result they are also diverse, which makes it a significant challenge to come up with an adequate definition". The challenge of defining Tantra is compounded by the fact that it has been a historically significant part of major Indian religions, including Buddhism, Hinduism and Jainism, both in and outside South Asia and East Asia. To its practitioners, Tantra is defined as a combination of texts, techniques, rituals, monastic practices, meditation, yoga, and ideology.
According to Georg Feuerstein, "The scope of topics discussed in the Tantras is considerable. They deal with the creation and history of the world; the names and functions of a great variety of male and female deities and other higher beings; the types of ritual worship (especially of Goddesses); magic, sorcery, and divination; esoteric "physiology" (the mapping of the subtle or psychic body); the awakening of the mysterious serpent power (kundalinî-shakti); techniques of bodily and mental purification; the nature of enlightenment; and not least, sacred sexuality." Hindu puja, temples and iconography all show tantric influence. These texts, states Gavin Flood, contain representation of "the body in philosophy, in ritual and in art", which are linked to "techniques of the body, methods or technologies developed within the tantric traditions intended to transform body and self".
The term "tantrism" is a 19th-century European invention not present in any Asian language; compare "Sufism", of similar Orientalist origin. According to Padoux, "Tantrism" is a Western term and notion, not a category that is used by the so-called "Tantrists" themselves.[note 5] The term was introduced by 19th-century Indologists, with limited knowledge of India and in whose view Tantrism was a particular, unusual and minority practice in contrast to Indian traditions they believed to be mainstream.
Robert Brown similarly notes that "tantrism" is a construct of Western scholarship, not a concept of the religious system itself. He defines Tantrism as an apologetic label of Westerners for a system that they little understand that is "not coherent" and which is "an accumulated set of practices and ideas from various sources, that has varied between its practitioners within a group, varied across groups, across geography and over its history". It is a system, adds Brown, that gives each follower the freedom to mix Tantric elements with non-Tantric aspects, to challenge and transgress any and all norms, experiment with "the mundane to reach the supramundane".
Teun Goudriaan in his 1981 review of Hindu Tantrism, states that Tantrism usually means a "systematic quest for salvation or spiritual excellence" by realizing and fostering the divine within one's own body, one that is simultaneous union of the masculine-feminine and spirit-matter, and has the ultimate goal of realizing the "primal blissful state of non-duality". It is typically a methodically striven system, consisting of voluntarily chosen specific practices which may include Tantric items such as mantras (bijas), geometric patterns and symbols (mandala), gestures (mudra), mapping of the microcosm within one's body to the macrocosmic elements outside as the subtle body (kundalini-yoga), assignments of icons and sounds (nyasa), meditation (dhyana), ritual worship (puja), initiation (diksha) and others. Tantrism, adds Goudriaan, is a living system that is decidedly monistic, but with wide variations, and it is impossible to be dogmatic about a simple or fixed definition.
Tantrism is an overarching term for "Tantric traditions", states David Gray in a 2016 review, that combine Vedic, yogic and meditative traditions from ancient Hinduism as well as rival Buddhist and Jain traditions. it is a neologism of western scholars and does not reflect the self-understanding of any particular tantric tradition. While Goudriaan's description is useful, adds Gray, there is no single defining universal characteristic common to all Tantra traditions, being an open evolving system. Tantrism, whether Buddhist or Hindu, can best be characterized as practices, a set of techniques, with a strong focus on rituals and meditation, by those who believe that it is a path to liberation that is characterized by both knowledge and freedom.
According to Padoux, the term "Tantrika" is based on a comment by Kulluka Bhatta on Manava Dharmasastra 2.1, who contrasted vaidika and tantrika forms of Sruti (canonical texts). The Tantrika, to Bhatta, is that literature which forms a parallel part of the Hindu tradition, independent of the Vedic corpus. The Vedic and non-Vedic (Tantric) paths are seen as two different approaches to ultimate reality, the Vedic approach based on Brahman, and Tantrika being based on the non-Vedic Āgama texts. Despite Bhatta attempt to clarify, states Padoux, in reality Hindus and Buddhists have historically felt free to borrow and blend ideas from all sources, Vedic, non-Vedic and in the case of Buddhism, its own canonical works.
One of the key differences between the Tantric and non-Tantric traditions – whether it be orthodox Buddhism, Hinduism or Jainism – is their assumptions about the need for monastic or ascetic life. Non-Tantrika, or orthodox traditions in all three major ancient Indian religions, hold that the worldly life of a householder is one driven by desires and greeds which are a serious impediment to spiritual liberation (moksha, nirvana, kaivalya). These orthodox traditions teach renunciation of householder life, a mendicant's life of simplicity and leaving all attachments to become a monk or nun. In contrast, the Tantrika traditions hold, states Robert Brown, that "both enlightenment and worldly success" are achievable, and that "this world need not be shunned to achieve enlightenment".
The Keśin hymn of the Rig Veda (10.136) describes the "wild loner" who, states Karel Werner, "carrying within oneself fire and poison, heaven and earth, ranging from enthusiasm and creativity to depression and agony, from the heights of spiritual bliss to the heaviness of earth-bound labor". The Rigveda uses words of admiration for these loners, and whether it is related to Tantra or not, has been variously interpreted. According to David Lorenzen, it describes munis (sages) experiencing Tantra-like "ecstatic, altered states of consciousness" and gaining the ability "to fly on the wind". In contrast, Werner suggests that these are early Yoga pioneers and accomplished yogis of the ancient pre-Buddhist Indian tradition, and that this Vedic hymn is speaking of those "lost in thoughts" whose "personalities are not bound to earth, for they follow the path of the mysterious wind".
The two oldest Upanishadic scriptures of Hinduism, the Brihadaranyaka Upanishad in section 4.2 and Chandogya Upanishad in section 8.6, refer to nadis (hati) in presenting their theory on how the Atman (soul) and the body are connected and interdependent through energy carrying arteries when one is awake or sleeping, but they do not mention anything related to Tantric practices. The Shvetashvatara Upanishad describes breath control that became a standard part of Yoga, but Tantric practices do not appear in it. The Yoga Sutras of Patanjali are an early codification of Yogic practices. Later, according to Lorenzen, these early Yoga-related ideas develop into Hatha Yoga, and then diversify into the "mystical anatomy" of nadis and chakras of Tantric practices. The 7th-century shamanic-yogic component of Tantrism appears clearly in Tantric form in Bāṇabhaṭṭa's Harshacharita and Daṇḍin's Dashakumaracharita. In contrast to this theory of Lorenzen, other scholars such as Mircea Eliade consider Yoga and the evolution of Yogic practices to be separate and distinct from the evolution of Tantra and Tantric practices.
David Gordon White views Yogini cults as foundational to early tantra but disputes scholars who see their roots in an "autochthonous non-Vedic source" such indigenous tribes or the Indus Valley Civilization. Instead, White suggests Vedic Srauta texts mention offerings to goddesses Rākā, Sinīvālī, and Kuhū in a manner similar to a tantric ritual. Frederick Smith – a professor of Sanskrit and Classical Indian Religions, views Tantra to be a parallel religious movement to Bhakti movement of the 1st millennium AD. Tantra along with Ayurveda, states Smith, has traditionally been attributed to Atharvaveda, but this attribution is one of respect not of historicity. Ayurveda has primarily been an empirical practice with Vedic roots, but Tantra has been an esoteric, folk movement without grounding that can be traced to anything in Atharvaveda or any other vedic text.
A series of artwork discovered in Gandhara, in modern-day Pakistan, dated to be from about 1st century AD, show Buddhist and Hindu monks holding skulls. One of them shows the Buddha sitting in the center, and on one side sits a Buddhist monk and on the other side sits a Hindu monk. The legend corresponding to these artworks is found in Buddhist texts, and describes monks "who tap skulls and forecast the future rebirths of the person to whom that skull belonged". According to Robert Brown, these Buddhist skull-tapping reliefs suggest tantric practices may have been vogue by the 1st century AD to appear prominently in Buddhist art and its texts.
The Mahabharata, the Harivamsa, the Devi Mahatmya in the Markandeya Purana all contain references to the fierce, demon-killing manifestations of the Great Goddess, Mahishamardini, who is identified with Durga-Parvati. These suggest reverence and worship for Goddess in the India culture was an established tradition (Shaktism), by the early centuries of the 1st millennium. However, this does not mean Tantric rituals and practices were as yet a part of either Hindu or Buddhist traditions. "Apart from the somewhat dubious reference to Tantra in the Gangadhar inscription of 423 CE", states David Lorenzen, it is only 7th-century Banabhatta's Kadambari which provide convincing proof of Tantra and Tantric texts.
According to Flood, the earliest date for the Tantra texts related to Tantric practices is AD 600, though most of them were probably composed after the 8th century onwards. By the 10th century an extensive corpus existed. Regionally, the tantric texts were mostly composed during this period in Kashmir and Nepal. They were also called agamas in Shaivism, samhita or Pancaratra in Vaishnavism, and as tantras in Shaktism. The Buddhists developed their own corpus of Tantras, which became the textual basis of Vajrayana. In Jainism, secondary texts suggest a substantial Tantra corpus based on the Surya tradition developed in the western regions of India, but complete manuscripts of these have not survived into the modern era. Among the Hindus, those belonging to the Vedic orthodox traditions rejected the Tantra texts, the Tantric followers incorporated the Vedic ideas within their own systems considering the Tantras as the higher, refined understanding of older ideas. Some considered the Tantra texts to be superior to the Vedas, while others considered them complementary:
According to Flood, very little is known about who created the Tantras, nor much is known about the social status of these and medieval era Tantrikas. The Tantra pioneers may have been ascetics who lived at the cremation grounds, possibly from "above low-caste groups" states Flood, and these were probably non-Brahmanical. These Hindu renouncers and ascetics trace back to far more ancient traditions, and they are mentioned in the Buddhist Pali canon. By the early medieval times, their practices may have included the imitation of the deities such as goddess Kali and god Bhairava, with offerings of non-vegetarian food, alcohol and sexual substances. According to this theory, these practitioners would have invited their deities to avesha mam (enter me), then reverted the role in order to control that deity and gain its power. These ascetics would have been supported by low castes living at the cremation places.
The early Tantric practices in Indian history are sometimes attributed to the Kapalikas (literally, "skull men", also called Somasiddhatins or Mahavartins). Little, however, is reliably known about them, and there is a paucity of primary sources on Kapalikas. The historical information about them is primarily available from dubious fictional works and the disparaging remarks made about them in the Buddhist, Hindu and Jain texts of the 1st millennium AD.
In Hāla’s Gatha-saptasati (composed by the 5th century AD), for example, the story calls a female character Kapalika, whose lover dies, he is cremated, she takes his cremation ashes and smears her body with it. The 6th-century Varāhamihira mentions Kapalikas in his literary works. Some of the Kāpālika practices mentioned in these texts are those found in Shaiva Hinduism and Vajrayana Buddhism, and scholars disagree on who influenced whom.
These early historical mentions are in passing and appear to be Tantra-like practices, they are not detailed nor comprehensive presentation of Tantric beliefs and practices. Epigraphic references to the Kaulas Tantric practices are rare. Reference is made in the early 9th century to vama (left-hand) Tantras of the Kaulas. Literary evidence suggests Tantric Buddhism was probably flourishing by the 7th-century. Matrikas, or fierce mother goddesses that later are closely linked to Tantra practices, appear both in Buddhist and Hindu arts and literature between the 7th and 10th centuries.
Major Tantric texts had been written by the 10th century, particularly in Kashmir, Nepal and Bengal. By the 10th or 11th century, Tantric texts had been translated into regional languages such as Tamil, and Tantric practices probably had spread across South Asia. It was broadly influential, with Flood describing it as follows:
Tantrism has been so pervasive that all of Hinduism after the eleventh century, perhaps with the exception of the vedic Srauta tradition, is influenced by it. All forms of Saiva, Vaisnava and Smarta religion, even those forms which wanted to distance themselves from Tantrism, absorbed elements derived from the Tantras.
The 13th-century Dvaita Vedanta philosopher Madhvacharya wrote copious commentaries on then existing major schools of Indian philosophies and practices, and cited the works of the 10th century Abhinavagupta considered as a major and influential Tantra scholar. However, Madhvacharya does not mention Tantra as a separate, distinct religious or ritual-driven practice. The early 20th-century Indian scholar Pandurang Vaman Kane conjectured that Madhvacharya ignored Tantra because it may have been considered scandalous. In contrast, Padoux suggests that Tantra may have been so pervasive by the 13th century that "it was not regarded as being a distinct system."
The Tantra texts and tantric practices involve a wide range of topics, mostly focused on spiritual topics, and not of a sexual nature. However, states Gavin Flood, Tantrism is more known in the West as being notorious for its antinomian elements, stereotypically portrayed as a practice that is esoteric eroticism and ritualized sex in the name of religion, one imbued with alcohol and offering of meat to fierce deities. This portrayal is not limited to the Western imagination, however. Jayanta Bhatta, the 9th-century scholar of the Nyaya school of Hindu philosophy and who commented on Tantra literature, stated that the Tantric ideas and spiritual practices are mostly well placed, but it also has "immoral teachings" such as by the so-called "Nilambara" sect where its practitioners "wear simply one blue garment, and then as a group engage in unconstrained public sex" on festivals. He wrote, this practice is unnecessary and it threatens fundamental values of society.
Sexuality has been a part of Tantric practices, sexual fluids have been viewed as "power substances" and used ritualistically. Some extreme texts, states Flood, go further such as the Buddhist text Candamaharosana-tantra advocating consumption of bodily waste products as "power substances", teaching the waste should be consumed as a diet "eaten by all the Buddhas" without slightest disgust. However, such esoteric practices are exceptional and extreme, they are not found in much of Buddhist and Hindu Tantric literature or practices. In the Kaula tradition and others where sexual fluids as power substances and ritual sex are mentioned, scholars disagree in their translations, interpretations and practical significance.
Douglas Renfrew Brooks, for example, states that the antinomian elements such as the use of intoxicating substances and sex were not animistic, but were adopted in some Kaula traditions to challenge the Tantric devotee to break down the "distinctions between the ultimate reality of Brahman and the mundane physical and mundane world". By combining erotic and ascetic techniques, states Brooks, the Tantric broke down all social and internal assumptions, became Shiva-like. In Kashmir Shaivism, states David Gray, the antinomian transgressive ideas were internalized, for meditation and reflection, and as a means to "realize a transcendent subjectivity".
In most Hindu and Buddhist Tantra texts, extreme forms of sexual ritualism is absent. In Jain tantric text, this is entirely absent. Yet, emotions, eroticism and sex are universally regarded in Tantric literature as natural, desirable, a means of transformation of the deity within, to "reflect and recapitulate the bliss of Shiva and Shakti". Kama and sex is another aspect of life and a "root of the universe", in the Tantric view, whose purpose extends beyond procreation and is another means to spiritual journey and fulfillment. This idea flowers with the inclusion of kama art in Hindu temple arts, and its various temple architecture and design manuals such as the Shilpa-prakasha by the Hindu scholar Ramachandra Kulacara.
Rituals are the main focus of the Tantras.[note 6] Rather than one coherent system, Tantra is an accumulation of practices and ideas. Because of the wide range of communities covered by the term, it is problematic to describe tantric practices definitively.
André Padoux notes that there is no consensus among scholars as to which elements are characteristic for Tantra, nor is there any text that contains all those elements. Also, most of those elements can also be found in non-Tantric traditions. According to Anthony Tribe, a scholar of Buddhist Tantra, Tantra has the following defining features:
According to David N. Lorenzen, Tantra practices include the following:
According to David Gordon White, mandalas are a key element of Tantra. They represent the constant flow and interaction of both divine, demonic, human and animal energy or impulses (kleshas, cetanā, taṇhā) in the universe. The mandala is a mesocosm, which mediates between the "transcendent-yet-immanent" macrocosm and the microcosm of mundane human experience. The godhead is at the center of the mandala, while all other beings, including the practitioner, are located at various distances from this center. Mandalas also reflected the medieval feudal system, with the king at its centre.
The godhead is both transcendent and immanent, and the world is regarded as real, and not as an illusion. The goal is not to transcend the world, but to realize that the world is the manifestation of the godhead, while the "I" is "the supreme egoity of the godhead." The world is to be seen with the eyes of the godhead, realizing that it is a manifestation as oneself. The totality of all that is a "realm of Dharma" which shares a common principle. The supreme is manifest in everyone, which is to be realized through Tantric practice.
The words mantram, tantram and yantram are rooted linguistically and phonologically in ancient Indian traditions. Mantram denotes the chant, or "knowledge." Tantram denotes philosophy, or ritual actions. Yantram denotes the means by which a person is expected to lead their life.
The mantra and yantra are instruments to invoke higher qualities, often associated with specific Hindu deities such as Shiva, Shakti, or Kali. Similarly, puja may involve focusing on a yantra or mandala associated with a deity.
Each mantra is associated with a specific Nyasa. Nyasa involves touching various parts of the body at specific parts of the mantra, thought to invoke the deity in the body. There are several types of Nyasas; the most important are Kara Nyasa and Anga Nyasa.
The deities are internalised as attributes of Ishta devata meditations, with practitioners visualizing themselves as the deity or experiencing the darshan (vision) of the deity. During meditation the initiate identifies with any of the Hindu gods and goddesses, visualising and internalising them in a process similar to sexual courtship and consummation. The Tantrika practitioner may use visualizations of deities, identifying with a deity to the degree that the aspirant "becomes" the Ishta-deva (or meditational deity).
In Hindu Tantra, uniting the deity and the devotee uses meditation and ritual practices. These practices are divided among three classes of devotees: the animal, heroic, and the divine. In the divine devotee, the rituals are internal. The divine devotee is the only one who can attain the object of the rituals (awakening energy).
The Tantra texts of the Vaishnava tradition are the Pancharatra, and typically called the Agamas in the Shaiva traditions. The term "Tantra" in Hindu genre of literature is usually used specifically to refer to Shakta Agamas. The Agamas literature is voluminous, and includes 28 Shaiva Agamas, 77 Shakta Agamas (also called Tantras), and 108 Vaishnava Agamas (also called Pancharatra Samhitas), and numerous Upa-Agamas.
Some Tantra texts in Hinduism are Vedic and others non-Vedic. Agama traditions include Yoga and Self Realization concepts, some include Kundalini Yoga, asceticism, and philosophies ranging from Dvaita (dualism) to Advaita (monism).
The means of worship in the Hindu Tantric practice differs from the Vedic form. While the Vedic practice of yajna there are no idols and shrines, in its Tantric traditions, idols and symbolic icons with puja are the means of worship. Temples, symbolism, icons that remind the devotee of attributes and values are a necessary part of the Agamic practice, while non-theistic paths are one of the many alternative means in the Vedic practice. This, however, does not necessarily mean that Tantra-Agamas and Vedas are opposed, according to medieval era Hindu theologians. Tirumular, for example, explained their link as, "the Vedas are the path, and the Agamas are the horse".
The Tantra-Agama texts of Hinduism present a diverse range of philosophies, ranging from theistic dualism to absolute monism. This diversity of views was acknowledged in Chapter 36 of Tantraloka, the 10th century scholar Abhinavagupta. In Shaivism alone, there are ten dualistic (dvaita) Agama texts, eighteen qualified monism-cum-dualism (bhedabheda) Agama texts, and sixty four monism (advaita) Agama texts. The Bhairava Shastras are monistic Tantra texts, while Shiva Shastras are dualistic.
Many tantric traditions developed within Buddhism, over its history in South Asia and East Asia. These are also called the Vajrayana traditions. The tradition has been particularly prevalent in Tibet and Nepal. The Buddhist Tantric practices and texts, states Jacob Dalton, developed between the 5th and the 7th centuries and this is evidenced by Chinese Buddhist translations of Indian texts from that period preserved in Dunhuang. Ryan Overbey too affirms this, stating that Buddhist Tantric spells and ritual texts were translated by Chinese Buddhist scholars six times and these spells appear in multiple texts between the 5th and 8th centuries.
According to Alexis Sanderson, various classes of Vajrayana literature developed as a result of royal courts sponsoring both Buddhism and Saivism. The Mañjusrimulakalpa, which later came to classified under Kriyatantra, states that mantras taught in the Shaiva, Garuda and Vaishnava tantras will be effective if applied by Buddhists since they were all taught originally by Manjushri. The Guhyasiddhi of Padmavajra, a work associated with the Guhyasamaja tradition, prescribes acting as a Shaiva guru and initiating members into Saiva Siddhanta scriptures and mandalas. The Samvara tantra texts adopted the pitha list from the Shaiva text Tantrasadbhava, introducing a copying error where a deity was mistaken for a place.
The Tantric traditions of Hinduism and Buddhism spread rapidly within India and Tibet, and from there to Southeast Asia, East Asia and Central Asia. They significantly influenced many other religious traditions such Jainism, Sikhism, the Tibetan Bön tradition, Daoism, and the Japanese Shintō tradition. In the Sikh literature, the ideas related to Shakti and goddess reverence attributed to Guru Gobind Singh, particularly in the Dasam Granth, are related to tantra ideas found in Buddhism and Hinduism.
The Jain worship methods, states Ellen Gough, were likely influenced by Shaktism ideas, and this is attested by the tantric diagrams of the Rishi-mandala where the Tirthankaras are portrayed. The Tantric traditions within Jainism use verbal spells or mantra, and rituals that are believed to accrue merit for rebirth realms.
The first Western scholar to seriously study Tantra was John Woodroffe (1865–1936), who wrote about Tantra under the pen name Arthur Avalon and is known as the "founding father of Tantric studies". Unlike previous Western scholars Woodroffe advocated for Tantra, defending and presenting it as an ethical and philosophical system in accord with the Vedas and Vedanta. Woodroffe practised Tantra and, while trying to maintain scholastic objectivity, was a student of Hindu Tantra (the Shiva-Shakta tradition).
Following Woodroffe a number of scholars began investigating Tantric teachings, including scholars of comparative religion and Indology such as Agehananda Bharati, Mircea Eliade, Julius Evola, Carl Jung, Giuseppe Tucci and Heinrich Zimmer. According to Hugh Urban, Zimmer, Evola and Eliade viewed Tantra as "the culmination of all Indian thought: the most radical form of spirituality and the archaic heart of aboriginal India", regarding it as the ideal religion for the modern era. All three saw Tantra as "the most transgressive and violent path to the sacred".