Which technological advancement led to a unifying force in the nation's culture

during the Roaring 20's?

The radio led to a unifying force in the nation's culture during the Roaring 20's.

Explanation:

The Roaring Twenties is a term that describes a period in the history of Western civilization which was characterized by a general increase in prosperity with dramatic changes in culture and, to a lesser extent, society, caused by the development and application of new technologies such as cars and radio. The term itself began to be used in the United States, where these trends first began, came to the fore and influenced the rest of the world.

In the United States, but also in the rest of the world, that period was interrupted by the collapse of the New York Stock Exchange and the beginning of the Great Depression, the consequences of which will be overcome only after the Second World War.