Why might a sudden surge of miners, ranchers, and farmers into an area (during the time period covered in this section) cause problems than environmental ones?

Because the lawlessness and disorder often accompanied the rapid growth of a town.

Explanation:

This should not happen, but the growth of a city involves many legal problems. The lack of government oversight allows, because of these legal problems, there is a lot of irregularities and disorder in the search for the solution of legal problems, especially when there is an increase of ranchers, miners than farmers, who need a certain amount of space and are the most likely to start irregular systems.