In cybalist@yahoogroups.com, <cybalist@yahoogroups.com> wrote:
> All this yields a an amount of 18 Theories, viz.:
There are yet other possibilities, such as PIE expansion from Bactria, followed by Indo-Iranian expansion from NW India (or possibly Gandhara), followed by Iranian expansion. The Indo-Iranian expansion followed by the Iranian expression could have removed traces of most intermediate IE groups until we reach Central Europe.
The only strong argument I know against this is that Dravidian loans seem to be very rare in Iranian, but un-IE roots in Vedic Sanskrit argue rather for a 'Para-Munda' neighbour, so perhaps Dravidan loans are not to be expected.