The 1920s (pronounced "nineteen-twenties" often shortened to the "'20s" or the "Twenties") was a decade that began on January 1, 1920, and ended on December 31, 1929. In America, it is frequently referred to as the "Roaring Twenties" or the "Jazz Age", while in Europe the period is sometimes referred to as the "Golden Twenties"^[1] because of the economic boom following World War I (1914–1918). French speakers refer to the period as the "Années folles" ("crazy years"),^[2] emphasizing the era's social, artistic, and cultural dynamism.

The 1920s saw foreign oil companies begin operations in Venezuela, which became the world's second-largest oil-producing nation.^[3] The devastating Wall Street Crash in October 1929 is generally viewed as a harbinger of the end of 1920s prosperity in North America and Europe. In the Soviet Union, the New Economic Policy was created by the Bolsheviks in 1921, to be replaced by the first five-year plan in 1928. The 1920s saw the rise of radical political movements, with the Red Army triumphing against White movement forces in the Russian Civil War, and the emergence of far-right political movements in Europe. In 1922, the fascist leader Benito Mussolini seized power in Italy. Other dictators that emerged included Józef Piłsudski in Poland, and Peter and Alexander Karađorđević in Yugoslavia. First-wave feminism made advances, with women gaining the right to vote in the United States (1920), Albania (1920), Ireland (1921), and with suffrage being expanded in Britain to all women over 21 years old (1928).

In Turkey, nationalist forces defeated Greece, France, Armenia and Britain in the Turkish War of Independence, leading to the Treaty of Lausanne (1923), a treaty more favorable to Turkey than the earlier proposed Treaty of Sèvres. The war also led to the abolition of the Ottoman Caliphate. Nationalist revolts also occurred in Ireland (1919–1921) and Syria (1925–1927). Under Mussolini, Italy pursued a more aggressive domestic and foreign policy, leading to the nigh-eradication of the Sicilian Mafia and the Second Italo-Senussi War in Libya respectively. In 1927, China erupted into a civil war between the Kuomintang (KMT)-led government of the Republic of China (ROC) and forces of the Chinese Communist Party (CCP). Civil wars also occurred in Paraguay (1922–1923), Ireland (1922–1923), Honduras (1924), Nicaragua (1926–1927), and Afghanistan (1928–1929). Saudi forces conquered Jabal Shammar and subsequently, Hejaz.

A severe famine occurred in Russia (1921–1922) due to the combined effects of economic disturbance because of the Russian Revolution and the Russian Civil War, exacerbated by rail systems that could not distribute food efficiently, leading to 5 million deaths. Another severe famine occurred in China (1928–1930), leading to 6 million deaths. The Spanish flu pandemic (1918–1920) and Russian typhus epidemic (1918–1922), which had begun in the previous decade, caused 25–50 million and 2–3 million deaths respectively. Major natural disasters of this decade include the 1920 Haiyuan earthquake (258,707~273,407 deaths), 1922 Shantou typhoon (50,000–100,000 deaths), 1923 Great Kantō earthquake (105,385–142,800 deaths), and 1927 Gulang earthquake (40,912 deaths).

Silent films were popular in this decade, with the highest-grossing film of this decade being either the American silent epic adventure-drama film Ben-Hur: A Tale of the Christ or the American silent war drama film The Big Parade, depending on the metrics used. Sinclair Lewis was a popular author in the United States in the 1920s, with his books Main Street and Elmer Gantry becoming best-sellers. Best-selling books outside the US included the Czech book The Good Soldier Švejk, which sold 20 million copies. Songs of this decade included "Mack the Knife" and "Tiptoe Through the Tulips".

During the 1920s, the world population increased from 1.87 to 2.05 billion, with approximately 700 million births and 525 million deaths in total.

Social history

The Roaring Twenties brought about several novel and highly visible social and cultural trends. These trends, made possible by sustained economic prosperity, were most visible in major cities like New York, Chicago, Paris, Berlin, and London. "Normalcy" returned to politics in the wake of hyper-emotional patriotism during World War I, jazz blossomed, and Art Deco peaked. For women, knee-length skirts and dresses became socially acceptable, as did bobbed hair with a finger wave or marcel wave. The women who pioneered these trends were frequently referred to as flappers.^[4]

The era saw the large-scale adoption of automobiles, telephones, motion pictures, radio, and household electricity, as well as unprecedented industrial growth, accelerated consumer demand and aspirations, and significant changes in lifestyle and culture, mostly in the urbanized areas of the Western World. The media began to focus on celebrities, especially sports heroes and movie stars. Large baseball stadiums were built in major U.S. cities, in addition to palatial cinemas.

Most independent countries passed women's suffrage after 1918, especially as a reward for women's support of the war effort and endurance of its deaths and hardships.^{[citation needed]}

Politics and wars

Wars

• Turkish War of Independence
  • Greco-Turkish War (May 1919 – October 1922)
  • Turkish–Armenian War (September–December 1920)
  • Franco-Turkish War (December 1918 – October 1921)
  • Royalist and separatist revolts (1919–1923)
• Unification of Saudi Arabia
  • Rashidi–Saudi War (1903–1921)
  • Kuwait–Saudi War (1919–1920)
  • Hejaz–Saudi War (1919–1925)
  • Transjordan-Saudi War (1922–1924)
• Polish–Soviet War (February 1919 – March 1922)
• Irish War of Independence (January 1919 – July 1921)
• Third Anglo-Afghan War (May – August 1919)
• Iraqi Revolt (1920)

  

• Rif War (1920–1927)
• Vlora War (1920)
• Second Italo-Senussi War (1923–1932)
• Great Syrian Revolt (1925–1927)
• United States occupation of Nicaragua (1912–1933)
• United States occupation of Haiti (1915–1934)
• United States occupation of the Dominican Republic (1916–1924)

Internal conflicts

• Russian Civil War (November 1917 – October 1922)
  • Tambov Rebellion (August 1920 – June 1921)
  • Allied intervention in the Russian Civil War (1918–1925)
• Patagonia Rebelde (1920–1922)
• Mahmud Barzanji revolts (1920–1922)
• Irish Civil War (June 28, 1922 – May 24, 1923)
• Cristero War in Mexico (1926-1929)
• Chinese Civil War (first phase 1927–1936)
• Ararat rebellion (1927–1930)
• Kongo-Wara rebellion (1928–1931)
• Afghan Civil War (November 14, 1928 – October 13, 1929)

Major political changes

• Rise of radical political movements such as communism led by the Soviet Union and fascism led by Italy.
• League of Nations and associated bodies as experiments in international cooperation and prevention of wars

Decolonization and independence

• Irish Free State gains independence from the United Kingdom in 1922.
• Egypt officially becomes an independent country through the Declaration of 1922, though it still remains under the military and political influence of the British Empire.

Prominent political events

Peace and disarmament

• Washington Naval Conference of 1922
  • followup treaties for the Limitation of Naval Armament
• Geneva Protocol 1925, outlaws poison gas
• Geneva Naval Conference 1927
• Kellogg–Briand Pact (1928) signed by most nations promising not to declare war.
• London Naval Treaty, 1930
• Conference for the Reduction and Limitation of Armaments 1932-1934

Women's suffrage

• Women's suffrage movement continues to make gains as women obtain full voting rights in the United Kingdom in 1918 (women over 30) and in 1928 (full enfranchisement), in the United States in 1920. Also : full or partial gains in Uruguay 1917; Canada, 1917–1925 except Quebec (1940); Czechoslovakia 1920; Irish Free State, 1922; Burma, 1922; Italy, 1925 (partial); Ecuador 1929.^[5]

United States

• The Osage Indian murders of the 1920s lead to the federal government launching the first large scale investigation by the recently formed Bureau of Investigation, which would later become the Federal Bureau of Investigation (FBI).^[6]
• Prohibition of alcohol occurs in the United States. Prohibition in the United States began January 16, 1919, with the ratification of the Eighteenth Amendment to the U.S. Constitution, effective as of January 17, 1920, and it continued throughout the 1920s. Prohibition was finally repealed in 1933. Organized crime turns to smuggling and bootlegging of liquor, led by figures such as Al Capone, boss of the Chicago Outfit.
• The Immigration Act of 1924 places restrictions on immigration. National quotas curbed most Eastern and Southern European nationalities, further enforced the ban on immigration of East Asians, South Asians, and Southeast Asians, and put mild regulations on nationalities from the Western Hemisphere (Latin Americans).
• The major sport was baseball and the most famous player was Babe Ruth.
• The Lost Generation (which characterized disillusionment), was the name Gertrude Stein gave to American writers, poets, and artists living in Europe during the 1920s. Famous members of the Lost Generation include Cole Porter, Gerald Murphy, Patrick Henry Bruce, Waldo Peirce, Ernest Hemingway, F. Scott Fitzgerald, Zelda Fitzgerald, Ezra Pound, John Dos Passos, and Sherwood Anderson.
• A peak in the early 1920s in the membership of the Ku Klux Klan of four to five million members (after its reemergence in 1915), followed by a rapid decline down to an estimated 30,000 members by 1930.^[7]
• The Scopes trial (1925), which declared that John T. Scopes had violated the law by teaching evolution in schools, creating tension between the competing viewpoints of creationism and evolution.

Europe

• Polish–Soviet War (1920–1921); Poland defeats Soviet expansion; Ukraine and Belarus were divided.
• Major armed conflict in Ireland including Irish War of Independence (1919–1921) resulting in part of Ireland becoming an independent country in 1922 followed by the Irish Civil War (1922–1923).
• Russian famine of 1921–22 claimed up to five million victims.^[8]
• The Union of Soviet Socialist Republics (Soviet Union) is created in 1922.
• Benito Mussolini leader of the National Fascist Party became Prime Minister of Italy, shortly thereafter creating the world's first fascist government. The Fascist regime establishes a totalitarian state led by Mussolini as a dictator. The Fascist regime restores good relations between the Roman Catholic Church and Italy with the Lateran Treaty, which creates Vatican City. The Fascist regime pursues an aggressive expansionist agenda in Europe such as by raiding the Greek island of Corfu in 1923, pressuring Albania to submit to becoming a de facto Italian protectorate in the mid-1920s, and holding territorial aims on the region of Dalmatia in Yugoslavia.
• In Germany, the Weimar Republic suffers from economic crisis in the early 1920s and hyperinflation of currency in 1923. From 1923 to 1925 the Occupation of the Ruhr takes place. The Ruhr was an industrial region of Germany taken over by the military forces of the French Third Republic and Belgium, in response to the failure of the Weimar Republic under Chancellor Wilhelm Cuno to keep paying the World War I reparations. The recently formed fringe National Socialist German Workers' Party (a.k.a. Nazi Party) led by Adolf Hitler attempts a coup against the Bavarian and German governments in the 1923 Beer Hall Putsch, which fails, resulting in Hitler being briefly imprisoned for one year in prison where he writes Mein Kampf.
• Turkish War of Independence (1919—1923).
• United Kingdom general strike (1926).

Asia

• The Qajar dynasty ended under Ahmad Shah Qajar as Reza Shah Pahlavi founds the Pahlavi dynasty, which later became the last monarchy of Iran.
• The Northern Expedition (1926–1928)
• The Chinese Civil War begins (1927–1937).
• In the Kingdom of Afghanistan, Amanullah Khan's reforms cause conflict with conservative factions, resulting in the Afghan Civil War.

Africa

• Pan-Africanist supporters of Marcus Garvey's Universal Negro Improvement Association and African Communities League (UNIA-ACL) are repressed by colonial powers in Africa. Garvey's UNIA-ACL supported the creation of a state led by black people in Africa including African Americans.^[9]

Economics

• Economic boom ended by "Black Tuesday" (October 29, 1929); the stock market crashes, leading to the Great Depression. The market actually began to drop on Thursday October 24, 1929, and the fall continued until the huge crash on Tuesday October 29, 1929.
• The New Economic Policy is created by the Bolsheviks in the Russian Soviet Federative Socialist Republic, to be replaced by the first five-year plan in 1928.
• The Dawes Plan, through which the U.S. made significant loans to Germany in order to help stabilize its economy and make war reparations payments, was enacted in 1924.
• Average annual inflation for the decade was virtually zero but individual years ranged from a high of 3.47% in 1925 to a deflationary −11% in 1921.^[10]

Natural disasters

• The Great Kantō earthquake struck the main Japanese island of Honshū on 1 September 1923. The earthquake had a magnitude of 7.9 on the moment magnitude scale.
• The 1920 Haiyuan earthquake struck central China on 16 September with a magnitude of 8.2 on the moment magnitude scale, killing 273,407.
• The 1922 Shantou typhoon killed upwards of 100,000 people in southern China.
• The 1928 Okeechobee hurricane killed 4,112 people in the Caribbean and the United States, resulting in major flooding around Lake Okeechobee.
• The 1927 Gulang earthquake struck Tibet and China, measuring 7.6 on the moment magnitude scale and killing 40,900 people.
• The Tri-State tornado outbreak struck the United States on 18 March 1925. The Tri-State Tornado, which the outbreak gets its name from, became the deadliest tornado in US history, as it killed 695 people, whom 613 of which in Illinois, 71 in Indiana, and 12 (possibly more) in Missouri. The outbreak as a whole, killed 751.
  • The tornado, was the deadliest in history, until 1989, where a F3 tornado hit Bangladesh, killing 1300. However, The Tri-State Tornado is still the 2nd deadliest in history, and the deadliest in the United States.

Assassinations and attempts

Prominent assassinations, targeted killings, and assassination attempts include:

• Walther Rathenau, Foreign Minister of Germany is assassinated by Ernst Werner Techow, Erwin Kern, and Hermann Willibald Fischer, all members of Organisation Consul on June 24, 1922.
• Francisco "Pancho" Villa, a Mexican Revolutionary general is assassinated by a group of seven assassins on July 20, 1923.

Science and technology

Technology

• John Logie Baird invents the first working mechanical television system (1925). In 1928, he invents and demonstrates the first color television.
• Warner Brothers produces the first movie with a soundtrack Don Juan in 1926, followed by the first Part-Talkie The Jazz Singer in 1927, the first All-Talking movie Lights of New York in 1928 and the first All-Color All-Talking movie On with the Show, 1929. Silent films start giving way to sound films. By 1936, the transition phase arguably ends, with Modern Times being the last notable silent film.
• Karl Ferdinand Braun invents the modern electronic cathode ray tube in 1897. The CRT became a commercial product in 1922.
• Record companies (such as Victor, Brunswick and Columbia) introduce an electrical recording process on their phonograph records in 1925 (that had been developed by Western Electric), resulting in a more lifelike sound.
• The first electric razor is patented in 1928 by the American manufacturer Col. Jacob Schick.
• The first selective Jukeboxes being introduced in 1927 by the Automated Musical Instrument Company.
• Harold Stephen Black revolutionizes the field of applied electronics by inventing the negative feedback amplifier in 1927.
• Clarence Birdseye invents a process for frozen food in 1925.
• Robert Goddard makes the first flight of a liquid-fueled rocket in 1926.

• 
  Robert Goddard and his rocket, 1926
• 
  1920s phone
• 
  Thompson submachine gun (1921 model)

Science

• Charles Lindbergh becomes the first person to fly solo across the Atlantic Ocean (May 20–21, 1927), nonstop from New York to Paris.^[11]
• Howard Carter opens the innermost shrine of King Tutankhamun's tomb near Luxor, Egypt, 1922
• Insulin was first used as a medication in Canada by Charles Best and Frederick Banting in 1922.^[12]
• In 1928, Alexander Fleming discovers penicillin

• 
  In 1928, Alexander Fleming discovers penicillin
• 
  Howard Carter opens the innermost shrine of King Tutankhamun's tomb near Luxor, Egypt, 1922

Popular culture

Film

Silent films were popular in this decade, with the highest-grossing film of this decade being either 1925 American silent epic adventure-drama film Ben-Hur: A Tale of the Christ or the 1925 American silent war drama film The Big Parade, depending of metrics used: Ben-Hur grossed more during its initial release, but The Big Parade ultimately grossed more via re-releases.

• Oscar winners: Wings (1927–1928), The Broadway Melody (1928–1929), All Quiet on the Western Front (1929–1930)
• First feature-length motion picture with a soundtrack (Don Juan) is released in 1926. First part-talkie (The Jazz Singer) released in 1927, first all-talking feature (Lights of New York) released in 1928 and first all-color all-talking feature (On with the Show) released in 1929.
• The first animated short film by Walt Disney is released in 1928, featuring Mickey Mouse. Steamboat Willie was the first sound cartoon to attract widespread notice and popularity.

Fashion

The 1920s is the decade in which fashion entered the modern era. It was the decade in which women first abandoned the more restricting fashions of past years and began to wear more comfortable clothes (such as short skirts or trousers). Men also abandoned highly formal daily attire and even began to wear athletic clothing for the first time. The suits men wear today are still based, for the most part, on those worn in the late 1920s. The 1920s are characterized by two distinct periods of fashion. In the early part of the decade, change was slow, as many were reluctant to adopt new styles. From 1925, the public passionately embraced the styles associated with the Roaring Twenties. These styles continued to characterize fashion until the worldwide depression worsened in 1931.

Music

• The "Jazz Age"—jazz and jazz-influenced dance music became widely popular throughout the decade.
• George Gershwin wrote Rhapsody in Blue and An American in Paris.
• Eddie Lang and Joe Venuti were the first musicians to incorporate the guitar and violin into jazz.

Radio

• First commercial radio stations in the U.S., 8MK (WWJ) in Detroit and (KDKA 1020 AM) in Pittsburgh, Pennsylvania, go on the air on August 27, 1920.
• Both stations broadcast the election results between Harding and Cox in early November. The first station to receive a commercial license is WBZ, then in Springfield MA, in mid-September 1921. While there are only a few radio stations in 1920–21, by 1922 the radio craze is sweeping the country.
• 1922: The BBC begins radio broadcasting in the United Kingdom as the British Broadcasting Company, a consortium between radio manufacturers and newspapers. It became a public broadcaster in 1926.
• On August 27, 1920, regular wireless broadcasts for entertainment began in Argentina for the first time,^[16] by a Buenos Aires group including Enrique Telémaco Susini. The station is soon called Radio Argentina. (See Radio in Argentina.)

Arts

• Beginning of surrealist movement.
• Art Deco becomes fashionable.
• The Group of Seven (artists).
• Pablo Picasso paints Three Musicians in 1921.
• René Magritte paints The Treachery of Images.
• Albert Gleizes paints Woman with Black Glove, 1920
• Marcel Duchamp completes The Bride Stripped Bare By Her Bachelors, Even (The Large Glass).
• The Museum of Modern Art opens in Manhattan, November 7, 1929, nine days after the Wall Street Crash.
• The first science fiction comic strip, Buck Rogers, begins January 7, 1929. The first Tarzan comic strip begins on the same date.

Literature

The best-selling books of every year in the United States were as follows:^[17]

• 1920: The Man of the Forest by Zane Grey
• 1921: Main Street by Sinclair Lewis
• 1922: If Winter Comes by A. S. M. Hutchinson
• 1923: Black Oxen by Gertrude Atherton
• 1924: So Big by Edna Ferber
• 1925: Soundings by A. Hamilton Gibbs
• 1926: The Private Life of Helen of Troy by John Erskine
• 1927: Elmer Gantry by Sinclair Lewis
• 1928: The Bridge of San Luis Rey by Thornton Wilder
• 1929: All Quiet on the Western Front by Erich Maria Remarque

Architecture

• Art Deco architecture attained its heyday
• Walter Gropius builds the Bauhaus in Dessau
• Le Corbusier published the book Toward an Architecture serving as the manifesto for a generation of architects.

Sports highlights

1920

• January 24: Grand Prix de Paris switches its name to Prix de l'Arc de Triomphe (horse race)
• February 13: Negro National League created (baseball)
• April: Babe Ruth began playing for the New York Yankees
• April–September: Summer Olympics held in Antwerp.
• August 17: Ray Chapman from the Cleveland Indians is killed by Carl Mays' pitch (baseball)
• August 20: National Football League founded
• Kenesaw Mountain Landis is named the first Commissioner of Baseball.

1921

• March 26: Schooner Bluenose launched

1923

• May 26: the 24 hours of Le Mans conducts their first sports car race
• October: The New York Yankees win the 1923 World Series, the first title for the team.

1924

• January–February: First Winter Olympic Games takes place in Chamonix France.
• May–July: Summer Olympics held in Paris, France.
• July 10–13: Paavo Nurmi wins five gold medals in Summer Olympics (track and field)

1925

• May 28: French Open invites non-French tennis athletes for the first time
• Germany and Belgium in first handball international tournament.

1926

• August 6: Gertrude Ederle swims English Channel and is first woman to do so.
• September 23: Gene Tunney wins Jack Dempsey's world heavyweight boxing title.

1927

• May 23: Warwickshire end Yorkshire's 71-match unbeaten sequence in the County Championship – the longest unbeaten sequence in that competition.
• June 3: First Ryder Cup golf tournaments are held in Massachusetts

1928

• February: Winter Olympics held in St. Moritz Switzerland.
• May–August: Women's Olympics takes place for first time, in 1928 Summer Olympics held in Amsterdam.
• William Ralph "Dixie" Dean wins the Football League, scores 60 goals in 39 matches for Everton F.C. (English Football)

1929

• The English team led by Wally Hammond defeats Australia in The Ashes series (Test Cricket)

Miscellaneous trends

• Youth culture of the Lost Generation; flappers, the Charleston, and the bob cut haircut.
• Fads such as marathon dancing, mah-jong, crossword puzzles and pole-sitting are popular.
• The height of the clip joint.
• The Harlem Renaissance centered in a thriving African American community of Harlem, New York City.
• Since the 1920s scholars have methodically dug into the layers of history that lie buried at thousands of sites across China.
• The tomb of Tutankhamun is discovered intact by Howard Carter (1922). This begins a second revival of Egyptomania.
• Twiglets are invented in December 1929 by Frenchman Rondalin Zwadoodie, and sold by Peek Freans.
• Smoking in America was deemed socially acceptable, with the first magazine advertising women smoking for the first time in 1927.^[18]
• Newly improved latex condoms resulted in soaring condom sales in the United States.^[18]

People

Science

Literature

Entertainers

Musicians

Film makers

Artists

Architects

• Marcel Breuer
• Le Corbusier
• Walter Gropius
• Ludwig Mies van der Rohe
• Frank Lloyd Wright

Sports figures