1. tribalism(n = noun.state) - the state of living together in tribes;
is a kind of state
2. tribalism(n = noun.cognition) - the beliefs of a tribal society;
is a kind of belief
The state of existing in tribes; also, tribal feeling; tribal prejudice or exclusiveness; tribal peculiarities or characteristics. [1913 Webster]
tribalism, n. tribal organization.
Derivative:
tribalist n. tribalistic adj.