Hinduism is one of the world's oldest major religions that is still practiced. Its earliest origins can be traced to the ancient Vedic civilization. A conglomerate of diverse beliefs and traditions, Hinduism has no single founder. It is the world's third largest religion following Christianity and Islam, with approximately a billion adherents, of whom about 905 million live in India and Nepal. Other countries with large Hindu populations include Bangladesh, Sri Lanka, Pakistan, Indonesia, Malaysia, Singapore, Mauritius, Fiji, Suriname, Guyana, Trinidad and Tobago, United Kingdom and Canada.
Hinduism contains a vast body of scriptures. Divided as Sruti (revealed) and Smriti (remembered) and developed over millennia, these scriptures expound on theology, philosophy and mythology, and provide spiritual insights and guidance on the practice of dharma (religious living). In the orthodox view, among such texts, the Vedas and the Upanishads are the foremost in authority, importance and antiquity. Other major scriptures include the Tantras, the sectarian Agamas, the Puranas and the epics Mahabharata and Ramayana. The Bhagavad Gīta, a treatise excerpted from the Mahābhārata, is sometimes called a summary of the spiritual teachings of the Vedas.
The Grihastha Dharma recognize four goals known as the purusharthas. They are:
kama: Sensual pleasure and enjoyment
Artha: Material prosperity and success
Dharma: Correct action, in accordance with one's particular duty and scriptural laws
Moksha: Liberation from the cycle of samsara
Among these, dharma and moksha play a special role: dharma must dominate an individual's pursuit of kama and artha while seeing moksha, at the horizon.
The Sannyasin Dharma recognizes, but renounces Kama, Artha and Dharma, focusing entirely on Moksha, the Grihastha Dharma eventually enters this stage. However, some enter this stage immediately from whichever stage they may be in.
Three major movements underpinned the naisance of a new epoch of Hindu thought: the advents and spread of Upanishadic, Jaina, and Buddhist philosophico-religious thought throughout the broader Indian landmass. The Upanishads, Mahavira (24th Tirthankar of Jains) and Buddha (founder of Buddhism) taught that to achieve moksha or nirvana, one did not have to accept the authority of the Vedas or the caste system. Buddha went a step further and claimed that the existence of a Self/soul or God was unnecessary. Buddhism adapted elements of Hinduism into their beliefs. Buddhism (or at least Buddhistic Hinduism) peaked during the reign of Asoka the Great of the Mauryan Empire, who unified the Indian subcontinent in the 3rd century BCE. After 200CE, several schools of thought were formally codified in Indian philosophy, including Samkhya, Yoga, Nyaya, Vaisheshika, Purva-Mimamsa and Vedanta. Charvaka, the founder of an atheistic materialist school, came to the fore in North India in the sixth century BCE. Between 400BCE and 1000CE, Hinduism expanded at the expense of Buddhism.
Though Islam came to India in the early 7th century with the advent of Arab traders and the conquest of Sindh, it started to become a major religion during the later Muslim conquest in the Indian subcontinent. During this period Buddhism declined rapidly and many Hindus converted to Islam. Numerous Muslim rulers such as Aurangzeb destroyed Hindu temples and persecuted non-Muslims, however some, such as Akbar, were more tolerant. Hinduism underwent profound changes in large part due to the influence of the prominent teachers Ramanuja, Madhva, and Chaitanya. Followers of the Bhakti movement moved away from the abstract concept of Brahman, which the philosopher Adi Shankara consolidated a few centuries before, with emotional, passionate devotion towards the more accessible avatars, especially Krishna and Rama.
Indology as an academic discipline of studying Indian culture from a European perspective was established in the 19th century, led by scholars such as Max Müller and John Woodroffe. They brought Vedic, Puranic and Tantric literature and philosophy to Europe and the United States. At the same time, societies such as the Brahmo Samaj and the Theosophical Society attempted to reconcile and fuse Abrahamic and Dharmic philosophies, endeavouring to institute societal reform. This period saw the emergence of movements which, while highly innovative, were rooted in indigenous tradition. They were based on the personalities and teachings of individuals, as with Shri Ramakrishna and Ramana Maharshi. Prominent Hindu philosophers, including Sri Aurobindo and Swami Prabhupada (founder of ISKCON), translated, reformulated and presented Hinduism's foundational texts for contemporary audiences in new iterations, attracting followers and attention in India and abroad. Others such as Swami Vivekananda, Paramahansa Yogananda, B.K.S. Iyengar and Swami Rama have also been instrumental in raising the profiles of Yoga and Vedant in the West.