Compare the following:
(1) In the middle of the thirteenth century a scholar wanted to copy a book. But he did not have enough paper. So he washed the writing off a manuscript he did not want, dried the paper and used it.
(2) A century later, if you bought some food in the market you could be lucky and have the shopkeeper wrap it for you in some paper.



By comparing it first sentence shows the paper is very less in middle thirteenth century and nowadays or next century we don't care about the importance of paper