In The Classical World by Robin Lane Fox the author contends that the extant evidence suggests that Greek colonies were mainly a male affair,1 and that subsequent generations arose from the union of these men with local women. Over at my other weblog I discuss the issues of cultural vs. biological group selection, and the fact that though each parent contributes 1/2 of your genome, they need not contribute 1/2 of your cultural outlook & orientation. I invite those acquainted with the literature on Magna Graecia to chime in, though Fox being a classicist himself, I am skeptical that his contention is without any support.
1 – And lower class and/or toublesome males at that.