History of the world
Whether in prehistoric or historic times, people always needed to be near reliable sources of potable water. Settlements developed on river banks as early as 3000 BCE in Mesopotamia, on the banks of Egypt's Nile River, in the Indus River valley, and along China's rivers. As farming developed, grain agriculture became more sophisticated and prompted a division of labour to store food between growing seasons. Labour divisions led to the rise of a leisured upper class and the development of cities, which provided the foundation for civilization. The growing complexity of human societies necessitated systems of accounting and writing.
History of India
Neolithic agricultural cultures sprang up in the Indus Valley region around 5000 BCE, in the lower Gangetic valley around 3000 BCE, represented by the Bhirrana findings (7570–6200 BCE) in Haryana, India, Lahuradewa findings (7000 BCE) in Uttar Pradesh, India, and Mehrgarh findings (7000–5000 BCE) in Balochistan, Pakistan; and later in Southern India, spreading southwards and also northwards into Malwa around 1800 BCE. The first urban civilisation of the region began with the Indus Valley Civilisation.