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The primary steps in the commercialization of sound cinema were taken in the mid- to late 1920s. At first, the sound films which included synchronized dialogue, known as "talking pictures", or "talkies", were exclusively shorts.

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television or newspapers, that reach very large numbers of people. Origin of mass medium. 1920-1925.

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The Roaring Economy of the 1920s. The 1920s have been called the Roaring '20s and for good reason. Not only was American culture 'roaring' in terms of style and social trends, but the economy was 'roaring' as well. The decade was a time of tremendous prosperity.

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few middle class consumers used credit to buy goods, by the end of the decade

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roped in millions of new investors, many of whom bought stock on margin

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is the purchase of an asset by paying the margin and borrowing the balance from a bank or broker.

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If freedom was the mindset of the Roaring Twenties, then jazz was the soundtrack. The Jazz Age was a cultural period and movement that took place in America during the 1920s from which both new styles of music and dance emerged.

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The Twenty-first Amendment (Amendment XXI) to the United States Constitution repealed the Eighteenth Amendment to the United States Constitution, which had mandated nationwide Prohibition on alcohol on January 16, 1919. The Twenty-first Amendment was ratified on December 5, 1933

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Organized crime is a category of transnational, national, or local groupings of highly centralized enterprises run by criminals who intend to engage in illegal activity, most commonly for money and profit

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Alphonse Gabriel Capone, sometimes known by the nickname "Scarface", was an American mobster, crime boss, and businessman who attained notoriety during the Prohibition era as the co-founder and boss of the Chicago Outfit

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Rum-running, or bootlegging, is the illegal business of transporting (smuggling) alcoholic beverages where such transportation is forbidden by law. Smuggling is usually done to circumvent taxation or prohibition laws within a particular jurisdiction.

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A speakeasy, also called a blind pig or blind tiger, is an illicit establishment that sells alcoholic beverages. Such establishments came into prominence in the United States during the Prohibition era.

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The National Prohibition Act, known informally as the Volstead Act, was enacted to carry out the intent of the 18th Amendment, which established prohibition in the United States.

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The Eighteenth Amendment of the United States Constitution effectively established the prohibition of alcoholic beverages in the United States by declaring the production, transport, and sale of alcohol illegal.

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Prohibition in the United States was a nationwide constitutional ban on the production, importation, transportation, and sale of alcoholic beverages from 1920 to 1933

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The Scopes Trial, formally known as The State of Tennessee v. John Thomas Scopes and commonly referred to as the Scopes Monkey Trial, was an American legal case in July 1925

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Eugenics is a set of beliefs and practices that aims at improving the genetic quality of a human population. The exact definition of eugenics has been a matter of debate since the term was coined by Francis Galton in 1883

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Nicola Sacco and Bartolomeo Vanzetti, Italian immigrants and anarchists, were executed for murder by the state of Massachusetts in 1927 on the basis of doubtful ballistics evidence . For countless observers throughout the world, Sacco and Vanzetti were convicted because of their political beliefs and ethnic background.