The correct answer to this open question is the following.
What most Americans wanted to do between the years 1920-1940 with regard to foreign affairs was to maintain the foreign policy of neutrality because they did not want their country to be involved in wars or international conflicts. American people preferred an isolationist policy regarding international conflicts.
After many years of having expansionistic and imperialistic ideas at the end of the 1800s, the citizens of the United States decided to support a neutrality policy -probably a disinterest in foreign affairs- and only wanted to focus on the internal affairs in the country.
Furthermore, in the 1920s, the country lived a positive economic period called "the Roaring 1920´s" in which they purchased many necessary and unnecessary things such as cars, homes, and electronics, mostly on credit. So in those years, they lived in a kind of "fantasy bubble" before the imminent arrival of the Great Depression.