The public education movement emphasized that civil responsibility and morality needed to be taught in order to have an effective democracy.
Horace Mann, who started the common school movement in Massachusetts, believed that universal public education was the best way to turn the nation's children into judicious republican citizens.
If a child is taught that a 4 legged furry animal is a dog, when it sees a cat it may assumes that is a dog as well because it assimilates four legs and fur with dogs.
I think it was land ownership. As many Americans made the push to the West,
it angered the Native Americans living there because they were not encroaching
on their land but were taking it away from them. This of course led to conflict that killed
many Native Americans
Unemployment had risen, leaving stocks in great excess of their real value. Among the other causes of the eventual market collapse were low wages, the proliferation of debt, a struggling agricultural sector and an excess of large bank loans that could not be liquidated.