A further confound is that you can not know that you had Cherokee ancestry in 2000, but discover that in the next ten years. I'd think this would be especially true during the rise of internet-based ancestry research tools.
200 million "white" Americans x 0.05 = roughly 10 million Americans with some type of NA ancestry. Give that the Cherokee were (and are) quite a large tribe, 700,000-800,000 living descendants doesn't seem at all unreasonable.
Edit: corrected to account for only the "white" population rather than the whole population.
I'm one of these, at least according to my Genographic Project results.
Prior to getting my results, I assumed my father's family's oral tradition of a Cherokee ancestor was fiction. But maybe it's true after all.
The author doesn't go into great detail, but it the estimate is probably correct given the statistics of the situation. The tribes have the tribal roll with the ancestry. You can do further reading on the genetic testing and people's beliefs about their ancestry.
Yes, there are fake tribes that come out of the woodwork hoping to gain casino rights, but many if not most of these non-recognized groups often accused of being fraudulent have verifiable histories going back 100 or more years, and have been studied by historians and anthropologists (with publications to prove it). It's a shame that such groups are denied the recognition they deserve, even after all that has happened in this country.
In fact, there is no official "casino rights" recognition to seek, it's just an often unwanted right that comes along with federal tribal recognition.
So many tribes, who want other educational and or commercial benefits that come with federal recognition (like being able to label their art/crafts "Indian-made"), or who simply want the recognition due to them for reasons of ethnic pride, have to face opposition from big casino corporations worried that some tribal leader in the future might propose a casino.
There should be a form of federal recognition by BIA that doesn't involve casino rights, that's the easiest solution (although unlikely to happen for legal reasons).
I am getting a bit sick of all the FUD in this area.
The fact is, for those states that do give federally-recognized tribes casino rights (ie, most of them), there is not way for a tribe to forfeit that right.
How in the world is that a "myth" or "FUD"? Look, I can understand why you got irritated at the other statement above (of course federal recognition brings benefits other than casino rights!), but I have no idea what you would call this fact a "myth".
If you're pointing out that this would have to come from the states, and not the federal government, then it's a good point (that's what I was referring to my "legal reasons"). But why call this "FUD"?
Speaks for itself.
I'm not sure this is an entirely sound hypothesis given the observable state of this country over basically its entire history.
Assuming completely random mating, the ancestor count of a small group inside a large stable population should double every generation.
"In 2000, the federal Census reported that 729,533 Americans self-identified as Cherokee. By 2010, that number increased, with the Census Bureau reporting that 819,105 Americans claiming at least one Cherokee ancestor."
12% in 10 years, or 33% in 25 years (a modern generation) is less than would be expected by that first-order theory.