Want this question answered?
The civilization's ancient writing has not been deciphered.
Indus River valley
Archaeologists and historians have been unable to decipher the Indus Valley writing.
cause.
I think the answer could be 'The Nile Valley' Civilization.
A sophisticated and technologically advanced urban culture is evidence of an organized government in The Indus Valley Civilization
The River Nile Valley.
The Harappan or Indus Valley civilization was located in the Indus Valley of Pakistan and the Sarasvati river valley in north India, from about 2600 to 1900 BC.
almost isolated;
Wing Wong
Mesopotamia
Mesopotamia