This calculation is a controversial and complex system used to determine an individual’s degree of ancestry from a federally recognized Native American tribe. It represents the fraction of a person’s lineage that can be traced back to a specific Native American tribe, as documented by tribal records. For example, an individual with one parent who is a full-blooded member of a tribe would possess a one-half designation, while a grandparent would equate to one-quarter, and so on.
The concept carries significant weight due to its influence on tribal membership eligibility and the distribution of benefits associated with that membership. These benefits can include access to healthcare, educational opportunities, housing assistance, and the right to participate in tribal governance. The origins of this system lie in policies enacted by the U.S. government, initially intended to limit or eliminate tribal sovereignty and land ownership. Its continued use has engendered debate within Native American communities concerning identity, self-determination, and the potential for tribal fragmentation over time.