Аннотация:The word "fundamentalism" has different nuances for Christians and for Muslims Christians normally associate fundametalism with the Born-Again Christians and their literal interpretation of the Bible.Some Muslim leaders view the word fundamentalism as a misnomer because a Muslim is supposed to follow God's word, and doing so makes one a fundamentalist.They claim that Western media baptized the word.But fundamentalism can have other synonyms.Some are called reformist, revivalist, militant or radical Islam.Perhaps, Muslims prefer the expression "revivalist Islam" because the movement also has a non-military arm.So whether the Muslims are called fundamentalists or not is just a matter of names.But the reality is there, something similar to that of the Christian fundamentalists.This study attempts to answer the following questions: (a) What are the characteristics of fundamentalism?(b) What are the forces behind them?(c) What is the common denominator between these two kinds of fundamentalism?I. CHRISTIAN FUNDAMENTALISM Before going to the Philippine scene, first a background on Christian fundamentalism in general.