[euroderf]

> They killed all the males and enslaved the women.

The first part of this is supported by an increasing number of archaeological finds. AFAIK the second part is not.

[dyauspitr]

From what I know, there is no archaeological evidence for either but there is strong genetic evidence for both.

[euroderf]

There is a lecture on yootoob but sorry I do not have the link. A Danish (IIRC) archeologist says they have been finding mass graves around northern europe that correlate to the hypothesis.

Also saying that words for things outside the home tend to PIE origins but things inside the home tend to non-PIE (i.e. pre-invasion) languages, supporting the idea that incoming males displaced & replaced existing males, taking the females.

Also saying that all in all, it mostly supports the theories originally proposed by the late Marija Gimbutas.