After the formulation of the Aryan invasion theory, archeology did not stop. New finds continued. These however have gradually undermined the invasion theory.
Harappan civilization (3100-1900 BC) was the largest in the world up to its time. Harappan sites have now been found as far west as to the coast of modern Iran, as far north as Turkestan on the Amu Darya river (a region usually identified with the Aryans), as far northeast as the Ganges, and south to the Godavari river. A site has even been found on the coast of Arabia. Thousands of sites have been found with several cities, like Ganweriwala on the Sarasvati river and Dholavira near the ocean in Kutch, as large as the first two major cities found, Harappa and Mohenjodaro. Most sites remain unexcavated and new explorations are likely to push the boundaries of this civilization yet further. A civilization of this size could not have been quickly or easily overrun by either migration or invasion.
Author : David Frawley