The standard definition of fundamentalism includes strict adherence to inflexible doctrines, either religious or secular. Such doctrines are variable and transitory, being in the nature of opinions, theories, or  propositions, improperly elevated to the status of absolute truth by a priestly caste which benefits in status and power.  Where there is knowledge (of the propositional kind), it will pass away. All truth claims eventually fail.  In my book I often refer to the Wizard, the founder of our church/cult, who had his own definite ideas about what constituted “wholesome entertainment”, and this was taken as absolute truth by we impressionable students. No one dared say, “I disagree with him about that” or, “that’s just his opinion”. In Sedona Arizona, I discovered a psychiatrist with a huge following, highly regarded by various New Age authors, who claimed to have discovered an avenue to the absolute truth on any subject using a technique called muscle testing. But all his “discoveries” sounded more like his own generational worldview. This seemed to be an updated, re-packaged and highly innovative repetition of the same old story.