Separatism
WordNet
noun
(1) Advocacy of a policy of strict separation of church and state
(2) A disposition toward schism and secession from a larger group; the principles and practices of separatists
"Separatism is a serious problem in Quebec"
"Demands for some form of separatism on grounds of religion have been perceived as a threat to mainstream education"
(3) A social system that provides separate facilities for minority groups