To what extent did developments in technology and transportation add to sectionalism in nineteenth century America?

Question

I know that the cotton gin has a tremendous effects on the sectionalism but i also know about railrodes... but i don't know how that leads to sectionalism. A little help?

Thanks!

Answer 1

Here are a number of articles on just that topic...

http://www.questia.com/library/science-and-technology/railroad-history.jsp