( 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 – 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 ).

He then attended the army's Staff College, Camberley, before being appointed Brigade Major in the 17th Infantry Brigade in January 1921.

* 1921 – Acting to restore confidence in baseball after the Black Sox Scandal, Judge Kenesaw Mountain Landis is elected as Major League Baseball's first commissioner.

* Major armed conflict in Ireland including Irish War of Independence ( 1919 – 1921 ) resulting in Ireland becoming an independent country in 1922 followed by the Irish Civil War ( 1922 – 23 ).

* July 19 – Elmer Valo, Slovak Major League Baseball player ( b. 1921 )

Sport: In the first half of the twentieth century, before Major League Baseball was racially integrated, dark-skinned and dark-complexion players were nicknamed Nig ; examples are: Johnny Beazley ( 1941 – 49 ), Joe Berry ( 1921 – 22 ), Bobby Bragan ( 1940 – 48 ), Nig Clarke ( 1905 – 20 ), Nig Cuppy ( 1892 – 1901 ), Nig Fuller ( 1902 ), Johnny Grabowski ( 1923 – 31 ), Nig Lipscomb ( 1937 ), Charlie Niebergall ( 1921 – 24 ), Nig Perrine ( 1907 ), and Frank Smith ( 1904 – 15 ).

In 1921, the German government founded the Arbeits-Kommandos ( work squads ) led by Major Bruno Ernst Buchrucker.

Roy Campanella ( November 19, 1921 – June 26, 1993 ), nicknamed " Campy ", was an American baseball player, primarily at the position of catcher, in the Negro leagues and Major League Baseball.

Llorente retired as Colonel in 1921 while Velasquez retired as Major in 1927.

He was promoted to Major in 1920, and in that year also entered the Field Artillery School at Fort Sill, Oklahoma ( 1920 – 1921 ).

** Major Richard Raymond Willis, VC ( staff at Haileybury College, 1921 – 1921 )

Everett was born in Burnham Deepdale, Norfolk to Major Anthony Michael Everett ( 1921 – 2009 ), who worked in business and served in the British Army, and wife Sara ( née Maclean ).

* Major General, USA-March 1921

* Enriquez, Major C. M., 1921.

Baker made the following G & S recordings with HMV: 1917 The Mikado ( Ko-Ko, Pish-Tush ( part ), and Pooh-Bah ( part )), 1919 The Gondoliers ( Antonio, Don Alhambra ( part ), Duke of Plaza-Toro and Giuseppe ); 1920 The Yeomen of the Guard ( Jack Point and Sergeant Meryll ( part )); 1920 The Pirates of Penzance ( Major-General Stanley ); 1921 Patience ( Bunthorne and Major ); and 1922 Iolanthe ( Lord Chancellor ).

Warren Edward Spahn ( April 23, 1921 – November 24, 2003 ) was an American Major League Baseball left-handed pitcher.

This Field was named for Major Sheldon H. Wheeler, who had assumed command of Luke Field in 1920 and was killed in an air accident in 1921.

* Major — 1 February 1921

Hazen Shirley " Kiki " Cuyler (; August 30, 1898 – February 11, 1950 ) was a Major League Baseball right fielder from 1921 until 1938.

* James Bradshaw Adamson ( 1921 – 2003 ), Major General in the United States Army

Mike Mitchell Goliat ( November 5, 1921 – January 13, 2004 ) was an American second baseman in Major League Baseball who played for the Philadelphia Phillies ( 1949 – 51 ) and St. Louis Browns ( 1951 – 52 ).

On August 5, 1921, Forbes Field was the site of the first live radio broadcast of a Major League Baseball game in the United States.

* Corporal Leo Major ( 1921 – 2008 ), Corporal in the Canadian Army