Turns out the American Nations left a genetic trace too

Some of you may recall the study published earlier this year in Nature Communications, where genetics researchers mapped reproductive clustering in North America in time and space. Many of you forwarded the map they produced because it so strikingly resembled those in American Nations.

I talked to the director overseeing that research at Ancestry and wrote about what the results tell us about the regional cultures for the third installment of "Balkanized America," my American Nations-powered series over at Medium.

Those unfamiliar with the American Nations paradigm will want to first take a look at the first part of the series -- an up-to-date overview of the American Nations model and its wide-ranging implications and utility.

Medium, the blog hosting site created by Twitter co-founder Evan Williams, is developing a members only section, and invited me to create the series, so you do need to subscribe to read these. I hope you enjoy.