Question

What attitudes became prevalent in America after World War I?

Answer 1

After World War 1, prevalent attitudes in America included one of not supporting the US being involved in foreign affairs. World War 1 started in 194 and ended in 1918. After the First World War, isolationism became prevalent in American society. Another attitude that developed was nativism.

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Answer 2

Isolationism became the prevalent attitude of America (Isolationism is the act of not becoming involved in other countries' affairs at all).