Yes, and we know when. It was during the Enlightenment that monastries were raided and the collected works were carted off. Near my town, the books were thrown

Yes, and we know when. It was during the Enlightenment that monastries were raided and the collected works were carted off. Near my town, the books were thrown in front of the carriage to prevent the vehicle from getting stuck. Disruptions, no matter how celebrated are always connected to a loss of old knowledge. Even if it is loss of "wrong" knowledge, its disaster. But then, that is life. The most brutal cut possible and only the most vital of information gets rediscovered, repeated and filtered down from word of mouth into another storage medium.