Postwar united states was most interested in:

A return to a normal state of affairs, is the right answer.

Explanation:

In reference to the Western world, the phrase post-war age is used to describe the time following the conclusion of the Second World War, even though many countries were in many other wars. Following the end of the Second World War, the United States of America became the superpower in the world. During this time, the USA was most interested in a return to a normal state of affair due to the very fact that the war cost all the nations a huge loss. Thus America wanted to recover its economy.

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