Final answer:
The opposition to World War I due to it being seen as an imperialist struggle
Step-by-step explanation:
Historical Opposition to World War I
Opposition to World War I was present among various groups who saw it as an imperialist struggle. Some Americans, including German and Irish immigrants, believed that the war had nothing to do with the United States and that taking sides could be detrimental to their interests. Socialists, such as Andrew Carnegie and Jane Addams, opposed the war on economic grounds, arguing that it would only benefit the wealthy. The reluctance to become involved in a foreign war was deeply rooted in American foreign policy, and critics regretted the exception made in this case.