Trade routes reopened btw Western Europe and the East.
The invention of the three-field system led to growth in rural medieval cities.
Explanation:
The Acquisition of wealth led to the acquisition of power. The main causes of the growth and development of the Italian towns were their trade with the East and the fillip that it received as a result of the crusades. Towns also grew up once the itinerant traders settled down in one or another place and became merchants.
