Why were the 1920s called the "Roaring Twenties"?

The 1920s were called the "Roaring Twenties" because it was a period of economic prosperity, cultural change, and social upheaval in many parts of the world, particularly in the United States. The decade was marked by a booming economy, technological innovations, and a widespread sense of optimism and excitement. People embraced new freedoms and indulged in new forms of entertainment and recreation, leading to a lively and vibrant cultural scene. The term "roaring" also reflects the exuberant and hedonistic lifestyle that many people adopted during this time.