Women's suffrage movement
It was the Louisiana purchase.
Answer:
Jobs in the city
Explanation:
The majority of the people that had given up on farming and moved to the cities is because of the jobs that the cities have offered. Most of the people did not had large farmlands, but instead they either had small ones, or were working for the large land owners. In this kind of circumstances they were earning very low amounts of money, so in general they were poor or on the verge of being poor. Since the cities were developing quickly, the industry was growing, and there was a constant demand for labor force, most of the people left the farmlands in order to get a job into the cities, so that they can have a better life.
