Answer:
The development of the "Aryan migration theory"
Step-by-step explanation:
Archeological discoveries showing Harappa civilization was not destroyed by outsiders led to The development of the Aryan migration theory.
Those discoveries which were not destroyed led to what developed into the Aryan Migration Theory.
In 1853 CE, the Aryan Invasion Theory was made widely known by German Indologist, Max Muller.
The Westeners actually propagated a belief that the nomadic and light-skinned Aryans invaded northern India and conquered it. It was said that the Aryans descended from an unknown land.