Human's plural composition and its position toward itself, groups, social contexts, society, etc.
Humans are a selective social species.
This seems, reductive as it is, a relatively proper description. Better than the general “human is a social being/species”. Or human as a societal species (which is a real aspect). Or human as a group animal. Etc.
Besides (in addition and parallel existence to) great descriptions like:
Human as an excentrically (or not congruent with a centre) positioned being (by the philosophical anthropology of Helmuth Plessner).