Līdz šim nezināju par t.s. Danbāra skaitli:
https://en.wikipedia.org/wiki/Dunbar%27s_number"Primatologists have noted that, due to their highly social nature, primates must maintain personal contact with the other members of their social group, usually through social grooming."
un šādā kontekstā:
"Dunbar [..] proposes furthermore that language may have arisen as a "cheap" means of social grooming, allowing early humans to maintain social cohesion efficiently."