fundamentalism

Short definition from Wiktionary

Noun

1. 1
   The tendency to reduce a religion to its most fundamental tenets, based on strict interpretation of core texts.
2. 2
   A rigid conformity to any set of basic tenets.
3. 3
   The belief that fundamental financial quantities are the best predictor of the price of a financial instrument.
4. 4
   A Christian movement that started in the late 19th and early 20th centuries among British and American Protestants, which emphasizes literal interpretation of the Bible, and came up as a reaction to liberal theology and cultural modernism