Answer:
The answer is: <u><em>manifest destiny</em></u>
Explanation:
John L. O’Sullivan, Who worked as an editor of a magazine was the first one to use “manifest destiny” in 1845.
This concept stated that America has a right to expand across the whole continent so that they can become more powerful and independent.
People, who were classified as a new middle-class were people that started to make their own careers (starting business of getting a well-paid job), they have observed a great growth in their salaries at that time and had a lot of leisure time.
Expertise had a very important role - people believed that it is a solution to the weakness of society.
<span>people would not live in large towns and cities</span>
