I guess somebody's bound to ask sooner or later:
How long is a generation? (I always thought it was considered to be 30 years.)
https://www.ancestry.ca/learn/learningcenters/default.aspx?section=lib_generation
I thought it was more like 18 or 20.
However, in terms of a question like Warren's situation, number of years isn't the issue. It's literally how many generations intervened between the [purported] Native American ancestor and Ms. warren herself.
As an example, in researching whether I am eligible for membership in Sons of the American Revolution (I found that I am -- my paternal grandfather was an enrolled member, and I likely qualify on my mother's side as well), I traced my ancestry as far back as the Revolution. (Actually, my grandfather did it -- I only had to add my father's generation and myself). For me to get back to the American Revolution ancestor takes me back six generation steps (
i.e. if I'm generation 1, the qualifying ancestor is generation 7. He was born in 1737 and died in 1793). If Warren's purported Native American genetic link is 8 to 10 generations back, that almost certainly means before the American Revolution, and therefore MANY years before the trail of tears and the conquest of the Native Americans by the bluecoats.