I assume that you are talking about the changes early in the history of the United States -- changes that went along with the very early stages of industrialization.
In general, historians tend to argue that this was a time during which there came to be more of a distinction between classes and more tension between the classes. Industrialization tended to create more inequality, just as the Jeffersonians had feared that it would. Instead of having a relatively homogeneous population of small farmers, the Northern US came to have a differentiated population with a large working class of people who had relatively little money.
You can argue that you start to see evidence of class tensions in things like the election and presidency of Andrew Jackson. You can argue that his Bank War is an example of how the poorer people distrusted the rich and felt resentment towards them.