Settled agriculture was first seen in china around
15,000 b. c.
10,000 b. c.
5000 b. c.
1500 a. d.

500 books can be produced by one man and a printing press within 5 months, while a copyist can only produce one in the same amount of time

people can eat food during that time

islam spread slowly through much of africa through trade and preaching.