Mccall pattern dating
Various Y chromosome studies show that the San carry some of the most divergent (oldest) human Y-chromosome haplogroups.
These haplogroups are specific sub-groups of haplogroups A and B, the two earliest branches on the human Y-chromosome tree.
Women have a high status in San society, are greatly respected, and may be leaders of their own family groups.
They make important family and group decisions and claim ownership of water holes and foraging areas.
Traditionally, the San were an egalitarian society.
Villages range in sturdiness from nightly rain shelters in the warm spring (when people move constantly in search of budding greens), to formalised rings, wherein people congregate in the dry season around permanent waterholes.
As of 2010, the San population in Botswana numbers about 50,000 to 60,000.
That is, "groups of populations with common genetic ancestry, who share ethnicity and similarities in both their culture and the properties of their languages".
The age rule resolves any confusion arising from kinship terms, as the older of two people always decides what to call the younger.
Relatively few names circulate (approximately 35 names per sex), and each child is named after a grandparent or another relative.
Ostrich eggs are gathered, and the empty shells are used as water containers.
Insects provide perhaps 10% of animal proteins consumed, most often during the dry season.