A pattern of religious militancy, a form of religion (especially Islam or Protestant Christianity) that upholds belief in the strict literal interpretation of scripture and demands adherence to these interpretations from followers
Christian fundamentalism is a reaction to social changes that occur organically, such as same-sex marriage and women's control over their reproductive rights
Other forms of fundamentalism are reactions to enforced social change or cultural imperialism, such as the rejection of western norms and values by terrorist groups