Why are the 1920s called the roaring twenties

The 1920's in the United States, called "roaring" because of the exuberant, freewheeling popular culture of the decade. The Roaring Twenties was a time when many people defied Prohibition, indulged in new styles of dancing and dressing, and rejected many traditional moral standards.

The 1920s are called the booming twenties or the roaring twenties because during that ere there was lots of excitement. Considering that a war had just ended and the troops had been dismissed. Now, they had time to spend with their families. Also the African Americans were in the whirlwind of the Harlem Renaissance.