1920s in the context of Blackshirts

A telephone network is a telecommunications network that connects telephones to support calls between them that facilitate human communication. The technology eventually came to be used for communication between humans and machines (i.e. fax and dial-up Internet access) although today this has been replaced with digital technologies.

The world was transformed in the 1920s as the phone became ubiquitous; with people sharing news, ideas, and personal information. During the 1990s, the phone helped transform the world again with the advent of computers, sophisticated communication devices, and via dial-up internet.

The Roaring Twenties, sometimes stylized as Roaring '20s, refers to the 1920s decade in music and fashion, as it happened in Western society and Western culture. It was a period of economic prosperity with a distinctive cultural edge in the United States and internationally, particularly in major cities such as Berlin, Buenos Aires, Chicago, London, Los Angeles, Mexico City, New York City, Paris, and Sydney. In France, the decade was known as the années folles ('crazy years'), emphasizing the era's social, artistic and cultural dynamism. Jazz blossomed, the flapper redefined the modern look for British and American women, and Art Deco peaked.

The social and cultural features known as the Roaring Twenties began in leading metropolitan centers and spread widely in the aftermath of World War I. The spirit of the Roaring Twenties was marked by a general feeling of novelty associated with modernity and a break with tradition, through modern technology such as automobiles, moving pictures, and radio, bringing "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 World War I. As such, the period often is referred to as the Jazz Age.

Flappers were a subculture of young Western women prominent after the First World War and through the 1920s who wore short skirts (knee length was considered short during that period), bobbed their hair, listened to jazz, and flaunted their disdain for prevailing codes of decent behavior. Flappers have been seen as brash for wearing excessive makeup, drinking alcohol, smoking cigarettes in public, driving automobiles, treating sex in a casual manner, and otherwise flouting social and sexual norms. As automobiles became more available, flappers gained freedom of movement and privacy.

Flappers are icons of the Roaring Twenties, a period of postwar social and political turbulence and increased transatlantic cultural exchange, as well as of the export of American jazz culture to Europe. More conservative people, who belonged mostly to older generations, reacted with claims that the flappers' dresses were "near nakedness" and that flappers were "flippant", "reckless", and unintelligent.