David Treuer (Ojibwe) wrote about tribal citizenship and blood quantum in the New York Times on Dec. 20, 2011.
He decries the fact that tribal communities are still using a system of "blood membership that was imposed upon us in a violation of our sovereignty."
He states, and I agree, that the United States was a fan of blood quantum citizenship determinations because passing generations and intermarriage "would eliminate Indian communities, and the [U.S.] government would be off the hook."
But even from the tribal side, he says that "Blood quantum has always been about "the stuff," and it has always been about exclusion."
He lists some interesting ways that tribal governments and communities might use in the future to determine citizenship that gets us away from "genetics alone." I have often written about this subject and that tribal governments will need to develop alternative ways to determine citizenship in the near future.
Read Treuer's full piece – http://www.nytimes.com/2011/12/21/opinion/for-indian-tribes-blood-shouldnt-be-everything.html?_r=1