Answer:
The experience of the First World War was traumatizing. The so-called “civilized” Western democracies had plunged into a ferocious and deadly conflict with uncertain origins and an unsatisfying outcome. As a result, many became disillusioned with the values and ideals of American political democracy and consumer culture. The generation that came of age during the First World War and the “Roaring 1920s” is known as the “Lost Generation.”
On the political front, a debate erupted between President Wilson and his supporters, who sought an expanded role for the United States in world affairs, and isolationists in Congress, who feared becoming embroiled in future European conflicts. Though Wilson was the foremost advocate of the League of Nations, an international peacekeeping organization, the United States never officially joined the League due to isolationist opposition.
Step-by-step explanation:
Source -khanacademy.org