Final answer:
The U.S. transitioned from isolationism to intervention in World War I due to events such as the sinking of U.S. ships and the rise of Bolsheviks in Russia. Earlier or no U.S. entry would have had significant impacts on the war. Isolationism makes sense when other democracies are threatened, but the U.S. had a moral obligation to enter the war due to the sinking of U.S. ships and the potential spread of Bolshevik influence.
Step-by-step explanation:
The U.S. transitioned from isolationism to intervention in World War I due to a combination of factors. While the American public initially resisted intervention and favored neutrality, events such as the sinking of U.S. ships and the Zimmerman Telegram led to a change in public opinion. Additionally, strategic concerns, such as the potential victory of Germany and the rise of Bolsheviks in Russia, influenced the government's decision to enter the war.
If the United States had entered the war earlier or not entered at all, it would have had significant impacts on the war. Earlier U.S. entry could have potentially helped Britain and France, boosting their morale and potentially altering the course of the war. On the other hand, if the United States had not entered at all, it would have likely affected the outcome of the war, potentially leading to different alliances and political shifts in Europe.
Isolationism may make sense when other democracies are threatened if the U.S. prioritizes its own security and interests over international conflicts. However, the United States had a moral obligation to enter the war due to the sinking of U.S. ships by Germany and the potential spread of Bolshevik influence, which threatened democratic values. The decision to enter the war was not only driven by self-interest but also by the desire to uphold key democratic principles.