How did the growth of railroads impact american society after the civil war?

Railroads created a more interconnected society. 

Explanation:

Counties were able to more easily work together due to the decreased travel time. With the use of the steam engine, people were able to travel to distant locations much more quickly than if they were using only horse-powered transportation.

answer; andrew jackson approved nullification by signing it into law,and john calhoun opposed it saying it was unconstitutional;