(p. 28) The high walls that hedged about the mental life of the monks–the imposition of silence, the prohibition of questioning, the punishing of debate with slaps or blows of the whip–were all meant to affirm unambiguously that these pious communities were the opposite of the philosophical academies of Greece or Rome, places that had thrived upon the spirit of contradiction and cultivated a restless, wide-ranging curiosity.
All the same, monastic rules did require reading, and that was enough to set in motion an extraordinary chain of consequences. Reading was not optional or desirable or recommended; in a community that took its obligations with deadly seriousness, reading was obligatory. And reading required books. Books that were opened again and again eventually fell apart, however carefully they were handled. Therefore, almost inadvertently , monastic rules necessitated that monks repeatedly purchase or acquire books. In the course of the vicious Gothic Wars of the mid-sixth century and their still more miserable aftermath, the last commercial workshops of book production folded, and the vestiges of the book market fell apart. Therefore, again almost inadvertently, monastic rules necessitated that monks carefully preserve and copy those books that they already possessed.
Source:
Greenblatt, Stephen. The Swerve: How the World Became Modern. New York: W. W. Norton & Company, 2011.