Fundamentalism is a religious movement that emphasizes strict adherence to certain basic principles or doctrines, often understood as a return to the fundamentals of a religion. It typically involves a literal interpretation of sacred texts and an unwavering commitment to traditional beliefs and practices. Fundamentalists may reject modern interpretations of their faith and seek to restore what they perceive as its original purity. This can sometimes lead to intolerance towards other religions or ideologies, as well as a rejection of scientific or intellectual progress that challenges established beliefs.