WORLD CIVILIZATION

Detailed explanation-1: -The Indus Valley Civilization declined around 1800 BCE, and scholars debate which factors resulted in the civilization’s demise. One theory suggested that a nomadic, Indo-European tribe called the Aryans invaded and conquered the Indus Valley Civilization, though more recent evidence tends to contradict this claim.

Detailed explanation-2: -Many historians believe the Indus civilisation collapsed because of changes to the geography and climate of the area. Movements in the Earth’s crust (the outside layer) might have caused the Indus river to flood and change its direction.

Detailed explanation-3: -These small communities could not produce the same agricultural surpluses to support large cities. With the reduced production of goods, there was a decline in trade with Egypt and Mesopotamia. By around 1700 BCE, most of the Indus Valley Civilization cities had been abandoned.

Detailed explanation-4: -Indus civilization, also called Indus valley civilization or Harappan civilization, the earliest known urban culture of the Indian subcontinent. The nuclear dates of the civilization appear to be about 2500–1700 bce, though the southern sites may have lasted later into the 2nd millennium bce.