Khoisan of Southern Africa
Collectively known as the Khoisan (and other pejorative, questionable terms), these indigenous people of southern Africa represent dozens of individual ethnic groups and are one of a handful of extant population clusters that gave rise to all currently living Homo sapiens. They have some of the oldest and most frequently occuring Y-chromosomal and mitochondrial haplogroups of all Homo sapiens and are widely considered to be the first anatomically modern humans as well as the most genetically diverse (two other indigenous African populations can arguably make this claim).
Genetic mapping of the region they inhabit (mainly Angola, Namibia, and Bostwana) suggests that some of the individual ethnic groups have been in the region for tens of thousands of years. They are some of the last posessors of the clicking languages as well as one of the last societies to survive as hunter-gatherers
read more about the Khoisan and their struggle to keep their lands and way of life. Read more about Khoisan genetics here .