According to consensus in modern genetics anatomically modern humans first arrived on the Indian subcontinent from Africa between 73,000 and 55,000 years ago.[1] However, the earliest known human rema

In early second millennium BCE persistent drought caused the population of the Indus Valley to scatter from large urban centres to villages. Around the same time, Indo-Aryan tribes moved into the Punjab from Central Asia in several waves of migration. Their Vedic period (1500-500 BCE) was marked by the composition of the Vedas, large collections of hymns of these tribes. Their varna system, which evovled into the caste system, consisted of a hierarchy of priests, warriors, and free peasants, excluded indigenous peoples by labeling their occupations impure. The pastoral and nomadic Indo-Aryans spread from the Punjab into the Gangetic plain, large swaths of which they deforested for agriculture usage. The composition of Vedic texts ended around 600 BCE, when a new, interregional culture arose. Small chieftaincies, or janapadas, were consolidated into larger states, or mahajanapadas, and a second urbanisation took place. This urbanisation was accompanied by the rise of new ascetic movements in Greater Magadha, including Jainism and Buddhism, which opposed the growing influence of Brahmanism and the primacy of rituals, presided by Brahmin priests, that had come to be associated with Vedic religion,[4] and gave rise to new religious concepts.[5] In response to the succes of these movements, Vedic Brahmanism was synthesised with the preexisting religious cultures of the subcontinent, giving rise to Hinduism.

Most of the Indian subcontinent was conquered by the Maurya Empire during the 4th and 3rd centuries BCE. From the 3rd century BCE onwards Prakrit and Pali literature in the north and the Tamil Sangam literature in southern India started to flourish.[6][7] Wootz steel originated in south India in the 3rd century BCE and was exported to foreign countries.[8][9][10] During the Classical period, various parts of India were ruled by numerous dynasties for the next 1,500 years, among which the Gupta Empire stands out. This period, witnessing a Hindu religious and intellectual resurgence, is known as the classical or "Golden Age of India". During this period, aspects of Indian civilisation, administration, culture, and religion (Hinduism and Buddhism) spread to much of Asia, while kingdoms in southern India had maritime business links with the Middle East and the Mediterranean. Indian cultural influence spread over many parts of Southeast Asia, which led to the establishment of Indianised kingdoms in Southeast Asia (Greater India).[11][12]