Christian fundamentalism, also known as fundamental Christianity or fundamentalist Christianity, is a religious movement emphasizing biblical literalism and cessationism. In its modern form, it began in the late 19th and early 20th centuries among British and American Protestants as a reaction to theological liberalism and cultural modernism. Fundamentalists argued that 19th-century modernist theologians had misunderstood or rejected certain doctrines, especially biblical inerrancy, which they considered the fundamentals of the Christian faith.