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

“No material culture is found to move from west to east across the Indus”. [in the relevant time period]

Despite the early misgivings of some scholars about such a correlation between language and race and the circular nature of many of the arguments, the concept of a common linguistic, cultural, biological, and historical heritage linking European and Indian peoples became internationally accepted as more fact than theory. Based on linguistic reconstructions, the prehistoric to historic chronologies of Europe and India were interpreted as reflecting various invasions of Indo-European or Indo-Aryan peoples who possessed a common cultural heritage, albeit remote. For Europe, this concept ultimately resulted in the disaster of the Third Reich, whereas in South Asia, the concept of Indo-Aryan peoples played a quite different cultural role.

A cultural tradition refers to persistent configurations of basic technologies and cultural systems within the context of temporal and geographical continuity. This concept facilitates a stylistic grouping of diverse archaeological assemblages into a single analytical unit, while limiting the need for establishing the precise nature of cultural and chronological relationships that link assemblages but imply that such relationships exist..