Most of Africa is hot, so I'd say climate change
A simple, yet precise definition of civilization would be from the author of young adult books, John Green describes civilization as it requires having surplus production of food. Most civilizations were near the river. This also includes the existence of a government, labor, and trade.
We can’t answer the question without the article
Answer:
There are in Timbuktu numerous judges, teachers and priests, all properly appointed by the king. He greatly honors learning. Many hand-written books imported from Barbary are also sold. There is more profit made from this commerce than from all other merchandise.
Explanation: