Fundamentalism has a very specific meaning in the history of American Christianity, as the name taken by a coalition of mostly white, mostly northern Protestants who, in the late 19th and early 20th centuries, united in opposition to theological liberalism. Though the movement lost the public spotlight after the 1920s, it remained robust, building a network of separate churches, denominations, and schools that would become instrumental in the resurgence of conservative evangelicalism after the 1960s. In a larger sense, fundamentalism is a form of militant opposition to the modern world, used by some scholars to identify morally absolutist religious and political movements in Islam, Judaism, Christianity, and even Hinduism and Buddhism. While the core concerns of the movement that emerged within American Protestantism—defending the authority of the Bible and both separating from and saving their sinful world—do not entirely mesh with this analytical framework, they do reflect the broad and complex challenge posed by modernity to people of faith.