Write a paragraph on the study of past within 80-100 words. Please help me do this work I will mark you as brainliest.
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Answer: 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. However, the earliest known human remains in South Asia date to 30,000 years ago. Settled life, which involves the transition from foraging to farming and pastoralism, began in South Asia around 7,000 BCE. At the site of Mehrgarh, Balochistan, Pakistan, presence can be documented of the domestication of wheat and barley, rapidly followed by that of goats, sheep, and cattle. By 4,500 BCE, settled life had spread more widely,[2] and began to gradually evolve into the Indus Valley Civilization, an early civilization of the Old world, which was contemporaneous with Ancient Egypt and Mesopotamia. This civilisation flourished between 2,500 BCE and 1900 BCE in what today is Pakistan and north-western India, and was noted for its urban planning, baked brick houses, elaborate drainage, and water supply.
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 regions further northwest in several waves of migration. The resulting Vedic period was marked by the composition of the Vedas, large collections of hymns of these tribes whose postulated religious culture, through synthesis with the preexisting religious cultures of the subcontinent, gave rise to Hinduism. The caste system, which created a hierarchy of priests, warriors, and free peasants, but which excluded indigenous peoples by labeling their occupations impure, arose later during this period. Towards the end of the period, around 600 BCE, after the pastoral and nomadic Indo-Aryans spread from the Punjab into the Gangetic plain, large swaths of which they deforested to pave way for agriculture, a second urbanisation took place. The small Indo-Aryan chieftaincies, or janapadas, were consolidated into larger states, or mahajanapadas. This urbanisation was accompanied by the rise of new ascetic movements, including Jainism and Buddhism, which challenged the primacy of rituals, presided by Brahmin priests, that had come to be associated with Vedic religion,and gave rise to new religious concepts.
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