Final answer:
The speech caused the US to remain neutral and isolated in World War 1.
Step-by-step explanation:
The speech that is referred to in the question is the Declaration of Neutrality in 1914 by the United States. This speech stated that the United States must remain neutral in fact, as well as in name, during the trying times of World War 1.
As a result, the speech caused the US to remain isolated and neutral during the war. The US did not take sides or join the conflict because it wanted to maintain impartiality, fairness, and friendliness to all concerned.
Learn more about US neutrality in World War 1