The shift by Harappan groups, and perhaps, other Indus Valley cultural mosaic groups, is the only archaeologically documented west-to-east movement o… - Jim G. Shaffer

It is argued that current archaeological data do not support the existence of an Indo-Aryan or European invasion into South Asia at any time in the pre- or protohistoric periods. Instead, it is possible to document archaeologically a series of cultural changes reflecting indigenous cultural development from prehistoric to historic periods. The early Vedic literature describes not a human invasion into the area, but a fundamental restructuring of indigenous society that saw the rise of hereditary social elites.

In both instances, the Indo-Aryan concept was never subjected to rigorous validation beyond the field of historical linguistics. Linguistic reconstructions were used to interpret archaeological materials, which in tum were used to substantiate the original cultural reconstructions. It was not until the mid-20th century that archaeological data were independently used to examine the validity of the Indo-Aryan concept.

Detailed studies of plant and animal remains suggested that domesti­cated species were present in the earliest levels. The plant economy, reconstruc­ted from thousands o f seed impressions in mud bricks, was quite sophisticated... The presence o f wild examples o f wheat and barley suggests that their domestication was an indigenous process; o f some antiquity...