The Roaring Twenties is a phrase used to describe the 1920s, principally in North America but also in London, Paris and Berlin. The phrase was meant to emphasize the period’s social, artistic, and cultural dynamism. ‘Normalcy‘ returned to politics in the wake of World War I, jazz music blossomed, the flapper redefined modern womanhood, Art Deco peaked, and finally the Wall Street Crash of 1929 served to punctuate the end of the era, as The Great Depression set in. The era was further distinguished by several inventions and discoveries of far-reaching importance, unprecedented industrial growth, accelerated consumer demand and aspirations, and significant changes in lifestyle.
The social and cultural features known as the Roaring Twenties began in leading metropolitan centers, especially New York, Paris and Berlin, then spread widely in the aftermath of World War I. The United States gained dominance in world finance. Thus when Germany could no longer afford war reparations to Britain, France and other Allies, the Americans came up with the Dawes Plan and Wall Street invested heavily in Germany, which repaid its reparations to nations that in turn used the dollars to pay off their war debts to Washington. By the middle of the decade, prosperity was widespread. The second half of the decade becoming known as the “Golden Twenties“. In France and francophone Canada, they were also called the “années folles” (“Crazy Years”).
The spirit of the Roaring Twenties was marked by a general feeling of discontinuity associated with modernity, a break with traditions. Everything seemed to be feasible through modern technology. New technologies, especially automobiles, moving pictures and radio proliferated ‘modernity’ to a large part of the population. Formal decorative frills were shed in favor of practicality in both daily life and architecture. At the same time, jazz and dancing rose in popularity, in opposition to the mood of the specter of World War I. As such, the period is also often referred to as the Jazz Age.
(information taken from Wikipedia)