I seem to be missing something about Sardinian
(the language). There is the modern Romance language, which I gather is the
closest to Latin of all Romance languages. There was also the Phoenecian
language spoken there in antiquity. Is there is an undeciphered script I'm
unaware of?
As for the Sardinian genetic pool, well, this is
an island, and islands, especially isolated islands, tend to be genetically
homogeneous. It's the founder effect. The few people who get their first will
reproduce, fill all the available space, and perpetuate their genetic group.
Such groups do not take part in the genetic mixing you get on a mainland. I
gather that the Sardinian gene pool is quite distant from the rest of the
peoples surrounding it in Europe and Africa.
Mark.