[Cronos]

if you define a Caucasian as being someone who is descended from speakers of Proto-Indo-European

Actually Caucasian is more a racial term than a linguistic. By that basis, SEmites, Dravidians and Indo-Europeans are all Caucasians. SOmeone descended from the speakers of proto-Indo-European I'd call Aryan. And I think its about time we liberated a description like that from it's abuse by the nutzis

[seowulf]

Another definition of Caucasian is someone from the Caucasus region. On balance the evidence shows the earliest speakers of P-I-E were probably from the Caucasus.

The 19th century racial, i.e. skin color based, definition I agree should be scrapped. It makes much more sense to base a description of groups of human beings on language and common cultural and ethnic traits.