How did the development of towns drive the evolution of medieval society? '?

The development of towns drive has engage to evolution of medieval society by the towns in which they have made people to be free from each class and that they were able to choose the occupation they want and to travel.

china unilaterally claims the entire south china sea as sovereign territory, then builds artificial islands to bolster its claim. it suddenly activates an air defense identification zone over the east china sea, and threatens to down any aircraft that does not report its position. it builds roads into indian territory, then redraws the maps to show that it is actually chinese territory. the people's republic under president xi jinping is quickly becoming the bully of asia.

a.   it resulted in widespread unemployment.