The author wanted to illustrate how scary yellow fever was, he left the city in Knox' hands and had even wrote to him a letter right before he left, on Sept 9 of 1793, telling him to leave if he thought it was necessary.
In both situations people will only do whats best for them and not think of how the society benefits from situations only how they themself benefits.
Bulls run, battle of Gettysburg
The news forms of city governments that were established during the progressive era were better because they were able to bring positive change. Progressives aimed to provide better services for the cities so they could develop quicker. They structured a new system that was centralized, which also made the administration of the city easier.
