The Indus Valley Civilization, also known as the Harappan civilization, was one of the world's earliest urban societies. It existed from around 3300 BCE to 1300 BCE in what is now Pakistan and northwest India.
The Indus Valley Civilization declined around 1300 BCE for reasons that are still debated among historians. Possible factors include ecological changes, natural disasters, or invasion.
The legacy of the civilization can be seen in its contributions to urban planning, technology, and trade, which have had a lasting impact on the Indian subcontinent.