( Rossum's Universal Robots ) ( 1921 ) – the play that introduced the word robot to the world – were organic artificial humans, the word " robot " has come to primarily refer to mechanical humans, animals, and other beings.

* 1921 – Robert Cliche, Canadian politician and magistrate ( d. 1978 )

* 1921 – Black Friday: mine owners announce more wage and price cuts, leading to the threat of a strike all across England.

* 1921 – Tove Maës, Danish actress ( d. 2011 )

* 1921 – The British install the son of Sharif Hussein bin Ali ( leader of the Arab Revolt of 1916 against the Ottoman Empire ) as King Faisal I of Iraq.

* 1921 – Georg Alexander, Duke of Mecklenburg ( d. 1996 )

* 1921 – Leo Penn, American director ( d. 1998 )

* 1921 – Ernest Angley, American evangelist and broadcaster

* 1921 – J. James Exon, American politician ( d. 2005 )

They won the first eight matches in succession including a 5 – 0 whitewash in 1920 – 1921 at the hands of Warwick Armstrong's team.

* 2008 – Jake Warren, Canadian diplomat ( b. 1921 )

* 2012 – N. K. P. Salve, Indian politician ( b. 1921 )

The most important Canadian theorist was an American immigrant, Henry Wise Wood, president of the United Farmers of Alberta ( UFA ) during that movement's time as the governing party of the province ( 1921 – 1935 ).

* 1921 – Jack Kramer, American tennis player ( d. 2009 )

* 1921 – Major League Baseball Commissioner Kenesaw Mountain Landis confirms the ban of the eight Chicago Black Sox, the day after they were acquitted by a Chicago court.

* 1921 – Marilyn Maxwell, American actress ( d. 1972 )

* 1921 – Richard Adler, American songwriter and composer ( d. 2012 )

* 1921 – Hayden Carruth, American poet and critic ( d. 2008 )

* 1999 – Byron Farwell, American historian ( b. 1921 )

The second generation was led by Fernand Braudel ( 1902 – 1985 ) and included Georges Duby ( 1919 – 1996 ), Pierre Goubert ( 1915 – 2012 ), Robert Mandrou ( 1921 – 1984 ), Pierre Chaunu ( 1923 – 2009 ), Jacques Le Goff ( 1924 – ) and Ernest Labrousse ( 1895 – 1988 ).

Chicago was also a welcome host: there, in 1921, Prokofieff conducted the world premiere of the Love For Three Oranges, and played the first performance of his Third Piano Concerto.

His first application of the analysis of variance was published in 1921.

* In 1921, the British were the first to cross the North Atlantic in an airship.

His first book, Manhood of Humanity, was published in 1921.

The 1921 first published photo of The Ashes Urn: Its Origin and History | the Urn in the Illustrated London News.

The 1921 first published photo of the Ashes Urn used in a montage by the Perth Western Mail in 1924.

The ruthless and belligerent Armstrong led his team back to England in 1921 where his men lost only two games late in the tour to narrowly miss out of being the first team to complete a tour of England without defeat.

* 1921 – Anna Lee Aldred, American jockey, first female to be a licensed jockey ( d. 2006 )

* 1921 – Emir Abdullah establishes the first centralised government in the newly created British protectorate of Transjordan.

The coffin was put in the chapel on the first floor of the Arc on 10 November 1920, and put in its final resting place on 28 January 1921.

The BCG vaccine was first used in humans in 1921.

In 1921, D. C. Thomson had first entered the field of boys ' story papers with Adventure.

The Kid ( 1921 film ) | The Kid ( 1921 ), with Jackie Coogan, combined comedy with drama and was Chaplin's first film to exceed an hour.

Following its September 1921 release, Chaplin chose to return to England for the first time in almost a decade.

The first industrial station for the transformation of urban organic materials into compost was set up in Wels / Austria in the year 1921.

Charlton turned professional in 1920 and first entered the Football League in 1921.

Charlton's first Football League match was against Exeter City in August 1921, which they won 1 – 0.

The first census was conducted in the Kingdom of Serbs, Croats and Slovenes in 1921.

The first censuses in Uganda were taken in 1911, 1921 and 1931.

Location of the first Congress of the Chinese Communist Party in July 1921, in Xintiandi, former French Concession, Shanghai.

The first introduction of Dada artwork to the Parisian public was at the Salon des Indépendants in 1921.

Neurohormones were first identified by Otto Loewi in 1921.