Called Tribal Peoples, First Peoples, Native Peoples, Indigenous Peoples constitute about 5% of the world’s population,
It's not possible. Every living creature on Earth is an amalgamation of a wide range of genetic backgrounds. Unless of course, all your descendants slept with their identical twin siblings... have yours???
Genetic purity would cause grotesque, widespread deformities, thereby preventing the species from flourishing.
You've been buying into too much of Rich's "racial percentile" jibber-jabber.