1) State 2) Strong in-group loyalty 3) Strong loyalty to a group 
Tribalism is the state of being organized in, or advocating for, a tribe or tribes. In terms of conformity, tribalism may also refer in popular cultural terms to a way of thinking or behaving in which people are more loyal to their tribe than to their friends, their country, or any other social group. Tribalism has been defined in engaged theory a...
• (n.) The state of existing in tribes; also, tribal feeling; tribal prejudice or exclusiveness; tribal peculiarities or characteristics.
[n] - the state of living together in tribes 2. [n] - the beliefs of a tribal society
noun the beliefs of a tribal society