These questions have been partially answered — a single founding lineage, derived from northeast Asian populations, entering the Americas through Beringia and spreading southward and eastward over thousands of years, diversifying through isolation, genetic drift, and natural selection in different environments.

The broad outlines are established.

The specific details remain incompletely known.

Among the specific details that remain incompletely known is the genetic history of the early Holocene populations of south-central North America — the people who were living in Texas and adjacent regions eight to ten thousand years ago.

These populations would have been early in the process of diversification from the founding lineage, carrying genetic signatures that reflect both their Asian origins and the beginnings of their divergence into regionally distinct groups.

Understanding those signatures would contribute specifically to questions about how and when different regions of North America were populated, whether there were any secondary migrations or admixture events during the early Holocene, and how the genetic history of early Holocene populations relates to the genetic history of the Indigenous nations that are their descendants.