A reader might know more than he does. Greater volumes of published books allow for a quicker exchange of ideas. Knowledge therefore expands at a faster rate. As expertise grows, many more specialties with their own terms develop. Role of Merchants are greater in number.
Trade is large and growing.
Wealth is Commerce growing. Expanded trade promotes expanded manufacturing and world wide merchandizing. Merchants demand more from education. Their sons need a more vigorous, and technically excellent education. Wealthy merchants finance the founding of more and more Universities, which are out of the control of the church.