This is probably what could be considered the core of the whole process:<p>"Since collapse in material technology is always preceded by collapse in the practice of social technology, Dark Ages are always preceded by Intellectual Dark Ages. Knowledge of these social technologies is highly compartmentalized and, as a result, they are not understood explicitly by all parts of society. This means that a society undergoing an Intellectual Dark Age doesn’t realize it is going through one at all—all the people who would notice are long-gone, and those who remain are miseducated, role-playing the forms left behind by their predecessors without realizing that they’ve lost the substance. Often not just the knowledge, but the socioeconomic niche that once fostered the creation of new social technology has been obliterated in all but name."