How did indus valley begin?

The Indus Valley Civilization began around 3300 BCE, emerging in the fertile floodplain of the Indus River in present-day Pakistan and northwest India. This early urban society developed due to advances in agriculture, which allowed for surplus food production, leading to population growth and the establishment of complex cities like Harappa and Mohenjo-Daro. The civilization is characterized by its sophisticated urban planning, advanced drainage systems, and standardized weights and measures, reflecting a high level of social organization and trade. The exact reasons for its rise remain a topic of research, but environmental factors and trade connections likely played significant roles.