Original sentence: In the abstract to their paper the researchers stated, "In the most recent of these waves, Indo-European -speaking people from West Eurasia entered India from the Northwest and diffused throughout the subcontinent
Edited sentence: An alternative scenario, for example, might start from the association of light skin, as supported by an aristocratic indoors lifestyle, with socioeconomic success, similar to in medieval Europe.As Indo-European and Dravidic populations were indeed roughly distinguishable by skin color, such purely social preferences would in time lead to a disassociated genetic makeup as it has been found.As the degree of intermarriage is not well known at present, the speed and timing of the genetic dissociation cannot be adequately gauged; the process would have to start very pronounced around 1500BC for the Aryan invasion theory to be tenable, which is not supported by other genetic evidence - see above.In the abstract to their paper the researchers stated, "In the most recent of these waves, Indo-European-speaking people from West Eurasia entered India from the Northwest and diffused throughout the subcontinent.Many of the earlier studies used restrictive samples, ignoring the 'gotra' system of mating, which results in skewed samples.The association between language, culture and genetics is still not clearly established; for example, assortive mating leading to genetic separation among castes could also be a cultural artefact of later Vedic times.This would be in accord with the evidence of different population elements contributing in different degrees to various castes, but not be brought about by an invasion scenario, but by unmixing of a largely unified, but far from uniform population due to subsequent cultural influence)