Radio had a great influence on people in 1920s - it was the first such invention which let people know what happens on the other side of the world in a very short time. Its influence was comparable to today's influence of TV or Internet. So it probably shaped modernism (and any other movement) by inspiring people to do things they haven't seen or heard in their area before.
In the 1920s, radio transformed American culture by enabling mass communication and widespread entertainment. It played a crucial role in popularizing new music genres and creating a sense of national unity among listeners. This revolutionary medium significantly contributed to the ideals of modernism through its innovations and cultural influence.
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