There were mountains, barriers, and lots of water around to prevent invasion and disease
I believe the answer is globalization
Answer:
By the High Middle Ages, Europe was becoming more prosperous. This meant that there came to be more cathedrals, each with its own school. Without wealth, towns could not have supported cathedrals and cathedrals could not have supported schools. These schools eventually turned into universities in some cases.
Explanation:
A decrease in the nation's agricultural output
The british occupation of Yorktown
