Fundamentalism
Fundamentalism is the demand for a strict adherence to specific theological doctrines usually understood as a reaction against Modernist theology, primarily to promote continuity and accuracy. The term "fundamentalism" was originally coined by its supporters to describe a specific package of theological beliefs that developed into a movement within the Protestant community of the United States in the early part of the 20th century, and that had its roots in the Fundamentalist–Modernist Controversy of that time. The term usually has a religious connotation indicating unwavering attachment to a set of irreducible beliefs. "Fundamentalism" is sometimes used as a pejorative term, particularly when combined with other epithets (as in the phrase "right-wing fundamentalists").
Read more about Fundamentalism.