Did the US return to normalcy in the 1920s after WWI?

Americans wanted to return to normalcy after WWI. They did this by staying out of foreign affairs like they did before. The U.S. rejected the Treaty Versailles and the League of Nations. They basically turned thier backs on the rest of the world. President Harding even used "Back to normalcy" as his slogan. Basically in order to get back to normal they isolated themselves from the rest of the world.