com·mu·nal·ism 
(kə-mynə-lĭz′əm, kŏmyə-nə-)
(kə-mynə-lĭz′əm, kŏmyə-nə-)n.
1. Belief in or practice of communal ownership, as of goods and property.
2. Strong devotion to the interests of one's own minority or ethnic group rather than those of society as a whole.