Take the following as truth: In the Indus river valley, improved techniques permitted the storage of wheat and barley beyond daily needs, and so the cities of Harappa and Mohenjodaro emerged in the year 2300 b.c. , creating a civilization even more advanced than that of the Aryans who came later.
Then the following statement: "The Aryans failed to create a civilization as advanced as the one that came before." is true, false, or inconclusive?