For what reason did a number of americans move from the country to the city

(I am in middle shcool but I will try to help) Inventions such as the McCormick reaper and the steel blow made farming more efficient but meant that fewer laborers were needed to work the land. As more and more farms merged, many rural people moved to cities to find whatever work they could.(hope this helps)

The will be a : great britain wanted french gold mines