WORLD CIVILIZATION

Detailed explanation-1: -For reasons that are still unclear, between 1900 BCE-1700 BCE the Indus Valley Civilization went into decline, as its urban centers began to decay and were ultimately abandoned. The remaining outliers of the Indus Valley Civilization reverted to a pre-urban settlement type.

Detailed explanation-2: -The roots of the Indus Valley civilization can be traced back to the site of Mehrgarh in Pakistan dated to about 7000 BC. The civilization reached its peak around 2600 BC and it went into decline around 1900 BC.

Detailed explanation-3: -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.

Detailed explanation-4: -The mature phase of the Harappan civilisation lasted from c. 2600–1900 BCE. With the inclusion of the predecessor and successor cultures – Early Harappan and Late Harappan, respectively – the entire Indus Valley Civilisation may be taken to have lasted from the 33rd to the 14th centuries BCE.